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style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1985/">1985</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1986/">1986</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1987/">1987</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1988/">1988</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1989/">1989</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1990/">1990</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1991/">1991</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1992/">1992</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1993/">1993</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1994/">1994</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1995/">1995</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1996/">1996</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1997/">1997</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1998/">1998</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/1999/">1999</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2000/">2000</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2001/">2001</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2002/">2002</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2003/">2003</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2004/">2004</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2005/">2005</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2006/">2006</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2007/">2007</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2008/">2008</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2009/">2009</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2010/">2010</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2011/">2011</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2012/">2012</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2013/">2013</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2014/">2014</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2015/">2015</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2016/">2016</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2017/">2017</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2018/">2018</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2019/">2019</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2020/">2020</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2021/">2021</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2022/">2022</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2023/">2023</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2024/">2024</a><a class="date-selector" style="cursor:pointer;border:none;color:var(--color-black);border-radius:0.5rem;padding:0.25rem 0.5rem;font-weight:400;text-decoration:none" href="/archive/issues/2025/">2025</a></div></div></div><div class="issue__list-8JHD2"><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/12-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/16F48F26-32CF-4F1D-9D8CC2143808E64F_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 26" srcSet="https://static.scientificamerican.com/sciam/cache/file/16F48F26-32CF-4F1D-9D8CC2143808E64F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/16F48F26-32CF-4F1D-9D8CC2143808E64F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-28">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/12-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F6A4E7FF-153D-4086-B1C9ED8DBA71CDB6_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1668supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/F6A4E7FF-153D-4086-B1C9ED8DBA71CDB6_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F6A4E7FF-153D-4086-B1C9ED8DBA71CDB6_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-21">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/12-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/59D5A4F9-6958-47D5-8FA2560E47E9E537_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 25" srcSet="https://static.scientificamerican.com/sciam/cache/file/59D5A4F9-6958-47D5-8FA2560E47E9E537_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/59D5A4F9-6958-47D5-8FA2560E47E9E537_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-21">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/12-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CBB29507-5396-4F9C-97948D7E8208E335_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1667supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/CBB29507-5396-4F9C-97948D7E8208E335_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CBB29507-5396-4F9C-97948D7E8208E335_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-14">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/12-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BBC82DCC-3B16-416D-AD893D46E8D79E31_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 24" srcSet="https://static.scientificamerican.com/sciam/cache/file/BBC82DCC-3B16-416D-AD893D46E8D79E31_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BBC82DCC-3B16-416D-AD893D46E8D79E31_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-14">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/12-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/022AB50F-B050-4BF6-BE06E651FBF3751E_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1666supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/022AB50F-B050-4BF6-BE06E651FBF3751E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/022AB50F-B050-4BF6-BE06E651FBF3751E_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-07">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/12-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AF0E5F4A-9DD7-4701-9A13DAC8D8B3D91A_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 23" srcSet="https://static.scientificamerican.com/sciam/cache/file/AF0E5F4A-9DD7-4701-9A13DAC8D8B3D91A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AF0E5F4A-9DD7-4701-9A13DAC8D8B3D91A_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-12-07">December 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/11-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/10475F2B-C333-4EBD-8E0DCB73A22AD44E_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1665supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/10475F2B-C333-4EBD-8E0DCB73A22AD44E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/10475F2B-C333-4EBD-8E0DCB73A22AD44E_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-30">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/11-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/ADBB4866-C9E6-4090-854E99A2CBD6E3D8_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 22" srcSet="https://static.scientificamerican.com/sciam/cache/file/ADBB4866-C9E6-4090-854E99A2CBD6E3D8_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/ADBB4866-C9E6-4090-854E99A2CBD6E3D8_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-30">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/11-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CA3FA0AC-BB49-46EA-82B42E396C590BED_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1664supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/CA3FA0AC-BB49-46EA-82B42E396C590BED_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CA3FA0AC-BB49-46EA-82B42E396C590BED_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-23">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/11-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CAEE8AD7-9001-401C-AAA2EB8737F1D747_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 21" srcSet="https://static.scientificamerican.com/sciam/cache/file/CAEE8AD7-9001-401C-AAA2EB8737F1D747_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CAEE8AD7-9001-401C-AAA2EB8737F1D747_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-23">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/11-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9DBE1FF7-02EE-42A1-A22C44450B683807_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1663supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/9DBE1FF7-02EE-42A1-A22C44450B683807_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9DBE1FF7-02EE-42A1-A22C44450B683807_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-16">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/11-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9F4D2082-D663-4807-B13CCD77B2D69A13_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 20" srcSet="https://static.scientificamerican.com/sciam/cache/file/9F4D2082-D663-4807-B13CCD77B2D69A13_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9F4D2082-D663-4807-B13CCD77B2D69A13_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-16">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/11-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DDF41491-5153-4F15-8172BA89DA709B6E_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1662supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/DDF41491-5153-4F15-8172BA89DA709B6E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DDF41491-5153-4F15-8172BA89DA709B6E_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-09">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/11-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0ACE5527-85B5-4A59-8633B429D5474760_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 19" srcSet="https://static.scientificamerican.com/sciam/cache/file/0ACE5527-85B5-4A59-8633B429D5474760_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0ACE5527-85B5-4A59-8633B429D5474760_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-09">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/11-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8798F277-AFA1-4EEF-A2CC5D4879E36737_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1661supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/8798F277-AFA1-4EEF-A2CC5D4879E36737_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8798F277-AFA1-4EEF-A2CC5D4879E36737_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-02">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/11-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EDC66AA9-2FD4-4AB8-BD4EADAAB737A1AE_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 18" srcSet="https://static.scientificamerican.com/sciam/cache/file/EDC66AA9-2FD4-4AB8-BD4EADAAB737A1AE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EDC66AA9-2FD4-4AB8-BD4EADAAB737A1AE_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-11-02">November 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/10-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0ACB0C67-BE5F-4D38-A7CFF3D5F7B6ABD8_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1660supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0ACB0C67-BE5F-4D38-A7CFF3D5F7B6ABD8_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0ACB0C67-BE5F-4D38-A7CFF3D5F7B6ABD8_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-26">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/10-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8F9A0542-C6F8-478A-949283C0788F5248_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1659supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/8F9A0542-C6F8-478A-949283C0788F5248_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8F9A0542-C6F8-478A-949283C0788F5248_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-19">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/10-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/785BCAB5-AE41-4B6A-BB700B388390AFAA_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/785BCAB5-AE41-4B6A-BB700B388390AFAA_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/785BCAB5-AE41-4B6A-BB700B388390AFAA_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-19">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/10-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/40E5FB43-BFD8-4578-8D904B837832AAD2_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1658supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/40E5FB43-BFD8-4578-8D904B837832AAD2_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/40E5FB43-BFD8-4578-8D904B837832AAD2_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-12">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/10-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D524C7F4-977E-48C4-A3CB92F05B3FB213_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 15" srcSet="https://static.scientificamerican.com/sciam/cache/file/D524C7F4-977E-48C4-A3CB92F05B3FB213_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D524C7F4-977E-48C4-A3CB92F05B3FB213_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-12">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/10-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1D9CD2AE-D481-4055-9768CFE8322BE0B0_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1657supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/1D9CD2AE-D481-4055-9768CFE8322BE0B0_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1D9CD2AE-D481-4055-9768CFE8322BE0B0_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-05">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/10-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EC6AFA21-604D-489B-960A29717F46BAFF_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 14" srcSet="https://static.scientificamerican.com/sciam/cache/file/EC6AFA21-604D-489B-960A29717F46BAFF_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EC6AFA21-604D-489B-960A29717F46BAFF_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-10-05">October 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/09-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/28294F58-558A-4895-B02F46A0C8D6225A_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1656supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/28294F58-558A-4895-B02F46A0C8D6225A_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/28294F58-558A-4895-B02F46A0C8D6225A_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-28">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/09-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/84D71BF8-2869-4D08-990ED5A2832CEA62_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 13" srcSet="https://static.scientificamerican.com/sciam/cache/file/84D71BF8-2869-4D08-990ED5A2832CEA62_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/84D71BF8-2869-4D08-990ED5A2832CEA62_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-28">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/09-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/22BBB3ED-7B7F-4277-8E12710BEE98E48D_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1655supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/22BBB3ED-7B7F-4277-8E12710BEE98E48D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/22BBB3ED-7B7F-4277-8E12710BEE98E48D_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-21">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/09-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/94ABCD72-9B0C-4342-8DCB467DCBC3B2E0_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 12" srcSet="https://static.scientificamerican.com/sciam/cache/file/94ABCD72-9B0C-4342-8DCB467DCBC3B2E0_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/94ABCD72-9B0C-4342-8DCB467DCBC3B2E0_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-21">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/09-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/84130781-2768-4EBA-BCE634D140CC7E1C_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1654supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/84130781-2768-4EBA-BCE634D140CC7E1C_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/84130781-2768-4EBA-BCE634D140CC7E1C_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-14">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/09-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/547F7C1F-470E-4FF3-ACF509E5121E17B9_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 11" srcSet="https://static.scientificamerican.com/sciam/cache/file/547F7C1F-470E-4FF3-ACF509E5121E17B9_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/547F7C1F-470E-4FF3-ACF509E5121E17B9_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-14">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/09-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/77279225-7FFB-475A-A3CB6C750AE18AB7_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1653supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/77279225-7FFB-475A-A3CB6C750AE18AB7_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/77279225-7FFB-475A-A3CB6C750AE18AB7_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-07">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/09-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CB6E7025-FCB3-4455-96944CCCF08DE84E_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 10" srcSet="https://static.scientificamerican.com/sciam/cache/file/CB6E7025-FCB3-4455-96944CCCF08DE84E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CB6E7025-FCB3-4455-96944CCCF08DE84E_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-09-07">September 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/08-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/FCCBF01A-A02D-4602-BB72546A931C7606_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1652supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/FCCBF01A-A02D-4602-BB72546A931C7606_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/FCCBF01A-A02D-4602-BB72546A931C7606_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-31">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/08-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/975FBB14-2555-48C4-B5F321CD2FD02710_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 9" srcSet="https://static.scientificamerican.com/sciam/cache/file/975FBB14-2555-48C4-B5F321CD2FD02710_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/975FBB14-2555-48C4-B5F321CD2FD02710_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-31">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/08-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9B798B94-FFB8-4711-928B44077D1CD1E4_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1651supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/9B798B94-FFB8-4711-928B44077D1CD1E4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9B798B94-FFB8-4711-928B44077D1CD1E4_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-24">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/08-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2CB82E2B-1B17-4EAC-ADBA83A352E661B2_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 8" srcSet="https://static.scientificamerican.com/sciam/cache/file/2CB82E2B-1B17-4EAC-ADBA83A352E661B2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2CB82E2B-1B17-4EAC-ADBA83A352E661B2_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-24">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/08-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/527D5C86-F17A-4F1B-AC5F40217E1AF68B_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1650supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/527D5C86-F17A-4F1B-AC5F40217E1AF68B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/527D5C86-F17A-4F1B-AC5F40217E1AF68B_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-17">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/08-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A68B2C76-862E-4869-A53B53234BEA44E3_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 7" srcSet="https://static.scientificamerican.com/sciam/cache/file/A68B2C76-862E-4869-A53B53234BEA44E3_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A68B2C76-862E-4869-A53B53234BEA44E3_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-17">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/08-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B3997F1E-7F1E-4630-BE447C025BDF5132_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1649supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B3997F1E-7F1E-4630-BE447C025BDF5132_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B3997F1E-7F1E-4630-BE447C025BDF5132_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-10">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/08-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9C54B083-1AE1-4F6B-A7E082238B3B2A39_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/9C54B083-1AE1-4F6B-A7E082238B3B2A39_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9C54B083-1AE1-4F6B-A7E082238B3B2A39_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-10">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/08-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/92DBA77A-1276-49A5-842D332A32F5A9B8_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1648supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/92DBA77A-1276-49A5-842D332A32F5A9B8_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/92DBA77A-1276-49A5-842D332A32F5A9B8_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-03">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/08-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AA67340E-1439-4EF1-B43DEE18D471A77A_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/AA67340E-1439-4EF1-B43DEE18D471A77A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AA67340E-1439-4EF1-B43DEE18D471A77A_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-08-03">August 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/07-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EE2787CA-E806-45BF-9036214B837C040E_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1647supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/EE2787CA-E806-45BF-9036214B837C040E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EE2787CA-E806-45BF-9036214B837C040E_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-27">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/07-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A158DBDB-C4DF-4B87-B08318482E6043CE_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/A158DBDB-C4DF-4B87-B08318482E6043CE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A158DBDB-C4DF-4B87-B08318482E6043CE_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-27">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/07-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/4FDF92FF-3C3C-4001-BB2D2CC20F3DE6F0_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1646supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/4FDF92FF-3C3C-4001-BB2D2CC20F3DE6F0_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/4FDF92FF-3C3C-4001-BB2D2CC20F3DE6F0_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-20">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/07-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/76DFF8FE-3254-4D4A-A6CADC221D31144C_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/76DFF8FE-3254-4D4A-A6CADC221D31144C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/76DFF8FE-3254-4D4A-A6CADC221D31144C_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-20">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/07-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/88730252-0FD3-4844-8A84B5AEC1B8068D_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1645supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/88730252-0FD3-4844-8A84B5AEC1B8068D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/88730252-0FD3-4844-8A84B5AEC1B8068D_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-13">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/07-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9A6A90B2-3E29-45D6-B3AB01821AFD83BD_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/9A6A90B2-3E29-45D6-B3AB01821AFD83BD_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9A6A90B2-3E29-45D6-B3AB01821AFD83BD_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-13">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/07-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/68E4422E-A463-4A2E-B54A51001D2EA04F_source.gif?w=600" alt="SA Supplements Vol 64 Issue 1644supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/68E4422E-A463-4A2E-B54A51001D2EA04F_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/68E4422E-A463-4A2E-B54A51001D2EA04F_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-06">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/07-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B1AA561A-4B0A-4A5E-B0C62EEF613A270E_source.jpg?w=600" alt="Scientific American Magazine Vol 97 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/B1AA561A-4B0A-4A5E-B0C62EEF613A270E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B1AA561A-4B0A-4A5E-B0C62EEF613A270E_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-07-06">July 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/06-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/55B55A68-9791-49ED-95EDF72CD78A76CD_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1643supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/55B55A68-9791-49ED-95EDF72CD78A76CD_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/55B55A68-9791-49ED-95EDF72CD78A76CD_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-29">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/06-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/37C4B105-18AE-42DB-8375C6A959D1D6DF_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 26" srcSet="https://static.scientificamerican.com/sciam/cache/file/37C4B105-18AE-42DB-8375C6A959D1D6DF_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/37C4B105-18AE-42DB-8375C6A959D1D6DF_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-29">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/06-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E3B804E6-0326-4E98-B4553A58F2AF5186_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1642supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/E3B804E6-0326-4E98-B4553A58F2AF5186_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E3B804E6-0326-4E98-B4553A58F2AF5186_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-22">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/06-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0F586DF7-1D5B-4B91-9A8461B73FDDAAD8_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 25" srcSet="https://static.scientificamerican.com/sciam/cache/file/0F586DF7-1D5B-4B91-9A8461B73FDDAAD8_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0F586DF7-1D5B-4B91-9A8461B73FDDAAD8_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-22">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/06-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/7BC40D30-C56B-4F4C-8C9F1989D9755F97_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1641supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/7BC40D30-C56B-4F4C-8C9F1989D9755F97_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/7BC40D30-C56B-4F4C-8C9F1989D9755F97_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-15">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/06-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9C518EC9-B8AA-4B5C-AD0315A60043328E_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 24" srcSet="https://static.scientificamerican.com/sciam/cache/file/9C518EC9-B8AA-4B5C-AD0315A60043328E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9C518EC9-B8AA-4B5C-AD0315A60043328E_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-15">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/06-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DF1716ED-8C1A-4882-A173A6A64FF98EB9_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1640supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/DF1716ED-8C1A-4882-A173A6A64FF98EB9_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DF1716ED-8C1A-4882-A173A6A64FF98EB9_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-08">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/06-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F326A306-B4DB-4EDE-87FFC6ACA109905D_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 23" srcSet="https://static.scientificamerican.com/sciam/cache/file/F326A306-B4DB-4EDE-87FFC6ACA109905D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F326A306-B4DB-4EDE-87FFC6ACA109905D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-08">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/495EF54C-5DF8-460C-BE15AC0197603DF7_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1639supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/495EF54C-5DF8-460C-BE15AC0197603DF7_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/495EF54C-5DF8-460C-BE15AC0197603DF7_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-01">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A3BC0F72-64F7-48E5-B5181E1596E8369D_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 22" srcSet="https://static.scientificamerican.com/sciam/cache/file/A3BC0F72-64F7-48E5-B5181E1596E8369D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A3BC0F72-64F7-48E5-B5181E1596E8369D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-06-01">June 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/05-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BFC49258-55DF-4425-BB3E3ABF03AD7CC6_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1638supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/BFC49258-55DF-4425-BB3E3ABF03AD7CC6_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BFC49258-55DF-4425-BB3E3ABF03AD7CC6_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-25">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/05-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/316ED4E5-CDC7-47CE-95AB1C73FF5AE469_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 21" srcSet="https://static.scientificamerican.com/sciam/cache/file/316ED4E5-CDC7-47CE-95AB1C73FF5AE469_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/316ED4E5-CDC7-47CE-95AB1C73FF5AE469_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-25">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/05-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3D0F74B4-AD9D-47FB-B4B9F459D57C970E_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1637supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3D0F74B4-AD9D-47FB-B4B9F459D57C970E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3D0F74B4-AD9D-47FB-B4B9F459D57C970E_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-18">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/05-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6F42A5C9-DDB8-4A35-AC7901FE0B4B6B18_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 20" srcSet="https://static.scientificamerican.com/sciam/cache/file/6F42A5C9-DDB8-4A35-AC7901FE0B4B6B18_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6F42A5C9-DDB8-4A35-AC7901FE0B4B6B18_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-18">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/05-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B88C7991-E901-460B-ACC65D19562F6A30_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1636supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B88C7991-E901-460B-ACC65D19562F6A30_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B88C7991-E901-460B-ACC65D19562F6A30_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-11">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/05-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1BB71FDD-BBDE-40BB-A98AC60C05FE5B8F_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 19" srcSet="https://static.scientificamerican.com/sciam/cache/file/1BB71FDD-BBDE-40BB-A98AC60C05FE5B8F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1BB71FDD-BBDE-40BB-A98AC60C05FE5B8F_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-11">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/05-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A7ABD719-5ACE-4B68-A98F760AB90D7ED0_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1635supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A7ABD719-5ACE-4B68-A98F760AB90D7ED0_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A7ABD719-5ACE-4B68-A98F760AB90D7ED0_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-04">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/05-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5065C507-A79F-4C27-ABE781AF60556CE6_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 18" srcSet="https://static.scientificamerican.com/sciam/cache/file/5065C507-A79F-4C27-ABE781AF60556CE6_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5065C507-A79F-4C27-ABE781AF60556CE6_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-05-04">May 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/04-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C45B8CB7-B59B-4865-937ECE30009178BF_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1634supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C45B8CB7-B59B-4865-937ECE30009178BF_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C45B8CB7-B59B-4865-937ECE30009178BF_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-27">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/04-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/96A5C39C-5AD8-4D64-890AF840824F952E_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 17" srcSet="https://static.scientificamerican.com/sciam/cache/file/96A5C39C-5AD8-4D64-890AF840824F952E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/96A5C39C-5AD8-4D64-890AF840824F952E_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-27">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/04-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AAF7A7D9-35FF-4F0B-BACD117BB29E8048_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1633supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/AAF7A7D9-35FF-4F0B-BACD117BB29E8048_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AAF7A7D9-35FF-4F0B-BACD117BB29E8048_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-20">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/04-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/4626D230-99DD-4831-BDDBC76709AE87E9_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/4626D230-99DD-4831-BDDBC76709AE87E9_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/4626D230-99DD-4831-BDDBC76709AE87E9_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-20">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/04-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B894E1EE-8B9D-4804-928D338251EBB0B8_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1632supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B894E1EE-8B9D-4804-928D338251EBB0B8_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B894E1EE-8B9D-4804-928D338251EBB0B8_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-13">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/04-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5F9D7175-793F-4075-9709807A8D158C14_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 15" srcSet="https://static.scientificamerican.com/sciam/cache/file/5F9D7175-793F-4075-9709807A8D158C14_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5F9D7175-793F-4075-9709807A8D158C14_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-13">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/04-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2DACB1A6-AAAE-4204-B1E1EE85D71AB16E_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1631supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2DACB1A6-AAAE-4204-B1E1EE85D71AB16E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2DACB1A6-AAAE-4204-B1E1EE85D71AB16E_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-06">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/04-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/67727919-4EBF-4BBC-88C218AEB6D7CAD0_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 14" srcSet="https://static.scientificamerican.com/sciam/cache/file/67727919-4EBF-4BBC-88C218AEB6D7CAD0_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/67727919-4EBF-4BBC-88C218AEB6D7CAD0_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-04-06">April 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/03-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C2EBC888-66EB-4849-AD6301EEFB61A2EB_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1630supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C2EBC888-66EB-4849-AD6301EEFB61A2EB_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C2EBC888-66EB-4849-AD6301EEFB61A2EB_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-30">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/03-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CA40A066-6DE0-4275-B408823F3BA7E7C5_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 13" srcSet="https://static.scientificamerican.com/sciam/cache/file/CA40A066-6DE0-4275-B408823F3BA7E7C5_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CA40A066-6DE0-4275-B408823F3BA7E7C5_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-30">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/03-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3F2BEC52-E0DB-438E-9566F5F49BA0B751_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1629supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3F2BEC52-E0DB-438E-9566F5F49BA0B751_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3F2BEC52-E0DB-438E-9566F5F49BA0B751_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-23">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/03-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5AD5383F-9916-4D67-B881911A8B734E32_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 12" srcSet="https://static.scientificamerican.com/sciam/cache/file/5AD5383F-9916-4D67-B881911A8B734E32_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5AD5383F-9916-4D67-B881911A8B734E32_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-23">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/03-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/52C7EB7A-9618-47E1-B79BC2414AA89AD1_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1628supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/52C7EB7A-9618-47E1-B79BC2414AA89AD1_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/52C7EB7A-9618-47E1-B79BC2414AA89AD1_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-16">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/03-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/FC2711AA-D10A-4520-BB45FC7F2319BDEA_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 11" srcSet="https://static.scientificamerican.com/sciam/cache/file/FC2711AA-D10A-4520-BB45FC7F2319BDEA_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/FC2711AA-D10A-4520-BB45FC7F2319BDEA_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-16">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/03-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/87FE96F8-D848-49A9-B7F5BDB288EE140F_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1627supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/87FE96F8-D848-49A9-B7F5BDB288EE140F_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/87FE96F8-D848-49A9-B7F5BDB288EE140F_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-09">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/03-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2B043EE4-DB4F-4441-8ECFDCF82ED0D855_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 10" srcSet="https://static.scientificamerican.com/sciam/cache/file/2B043EE4-DB4F-4441-8ECFDCF82ED0D855_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2B043EE4-DB4F-4441-8ECFDCF82ED0D855_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-09">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/03-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C5400974-E28A-4E6D-92A4D57150468136_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1626supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C5400974-E28A-4E6D-92A4D57150468136_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C5400974-E28A-4E6D-92A4D57150468136_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-02">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/03-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A6F5B808-66EC-47AC-9AAAE0201C87B7A7_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 9" srcSet="https://static.scientificamerican.com/sciam/cache/file/A6F5B808-66EC-47AC-9AAAE0201C87B7A7_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A6F5B808-66EC-47AC-9AAAE0201C87B7A7_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-03-02">March 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/02-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DC50013B-6456-485C-9C8161CA7446301D_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1625supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/DC50013B-6456-485C-9C8161CA7446301D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DC50013B-6456-485C-9C8161CA7446301D_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-23">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/02-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/793ADB24-D99C-4C17-829395B92952DD1D_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 8" srcSet="https://static.scientificamerican.com/sciam/cache/file/793ADB24-D99C-4C17-829395B92952DD1D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/793ADB24-D99C-4C17-829395B92952DD1D_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-23">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/02-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/39B1147E-836E-4C2F-A945860D0635A1D0_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1624supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/39B1147E-836E-4C2F-A945860D0635A1D0_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/39B1147E-836E-4C2F-A945860D0635A1D0_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-16">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/02-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/67FAD1E1-CFA1-4951-AA9EF3F3EB0F26B4_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 7" srcSet="https://static.scientificamerican.com/sciam/cache/file/67FAD1E1-CFA1-4951-AA9EF3F3EB0F26B4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/67FAD1E1-CFA1-4951-AA9EF3F3EB0F26B4_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-16">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/02-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E9EAA8A8-85CD-4459-B5940E83A6725105_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1623supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/E9EAA8A8-85CD-4459-B5940E83A6725105_source.gif?w=300 300w, 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loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-09">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/02-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BCA5C78A-DBF4-47F5-A7BDD4A8A263544C_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1622supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/BCA5C78A-DBF4-47F5-A7BDD4A8A263544C_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BCA5C78A-DBF4-47F5-A7BDD4A8A263544C_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-02">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/02-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C3F99745-D869-4700-B7769F80C820A9F1_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/C3F99745-D869-4700-B7769F80C820A9F1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C3F99745-D869-4700-B7769F80C820A9F1_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-02-02">February 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/01-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/57E0A588-D96D-4494-83B0523E9C06F7C8_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1621supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/57E0A588-D96D-4494-83B0523E9C06F7C8_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/57E0A588-D96D-4494-83B0523E9C06F7C8_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-26">January 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/01-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3082EEA2-5BD2-46FA-AF3BCDC1E1B05EB9_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/3082EEA2-5BD2-46FA-AF3BCDC1E1B05EB9_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3082EEA2-5BD2-46FA-AF3BCDC1E1B05EB9_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-26">January 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/01-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/68939C89-946D-4081-B4A571AB5EECC46B_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1620supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/68939C89-946D-4081-B4A571AB5EECC46B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/68939C89-946D-4081-B4A571AB5EECC46B_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-19">January 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/01-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/569F44AE-1ACF-4078-94E87F84A4737D03_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/569F44AE-1ACF-4078-94E87F84A4737D03_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/569F44AE-1ACF-4078-94E87F84A4737D03_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-19">January 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/01-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/737CDA87-AEB6-4658-9DB52E5FDD44578A_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1619supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/737CDA87-AEB6-4658-9DB52E5FDD44578A_source.gif?w=300 300w, 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loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-12">January 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1907/01-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3135E4D6-458A-4984-A7E50E80AE0B3F31_source.gif?w=600" alt="SA Supplements Vol 63 Issue 1618supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3135E4D6-458A-4984-A7E50E80AE0B3F31_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3135E4D6-458A-4984-A7E50E80AE0B3F31_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Supplements</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-05">January 1907</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1907/01-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E374FF18-16E6-43F1-A867DC4E425AD8A5_source.jpg?w=600" alt="Scientific American Magazine Vol 96 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/E374FF18-16E6-43F1-A867DC4E425AD8A5_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E374FF18-16E6-43F1-A867DC4E425AD8A5_source.jpg?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Scientific American</h3><div class="issue__date-ozuG1"><time dateTime="1907-01-05">January 1907</time></div></div></div></a></div></div></main><footer 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