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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/1880/12-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BB5328B3-B8DE-4D96-959182575CCC90F7_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 26" srcSet="https://static.scientificamerican.com/sciam/cache/file/BB5328B3-B8DE-4D96-959182575CCC90F7_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BB5328B3-B8DE-4D96-959182575CCC90F7_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="1880-12-25">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/12-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0C9C8AF2-7FC4-43E6-A5425396181A51D4_source.gif?w=600" alt="SA Supplements Vol 10 Issue 259supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0C9C8AF2-7FC4-43E6-A5425396181A51D4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0C9C8AF2-7FC4-43E6-A5425396181A51D4_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="1880-12-18">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/12-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E254EECF-D8AA-4669-8709BE0270330CBA_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 25" srcSet="https://static.scientificamerican.com/sciam/cache/file/E254EECF-D8AA-4669-8709BE0270330CBA_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E254EECF-D8AA-4669-8709BE0270330CBA_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="1880-12-18">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/12-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/403954A7-3FDC-47D9-B93617E6CD50E807_source.gif?w=600" alt="SA Supplements Vol 10 Issue 258supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/403954A7-3FDC-47D9-B93617E6CD50E807_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/403954A7-3FDC-47D9-B93617E6CD50E807_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="1880-12-11">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/12-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6069978B-047B-4F99-B3C047927768317B_source.gif?w=600" alt="Scientific American Magazine Vol 43 Issue 24" srcSet="https://static.scientificamerican.com/sciam/cache/file/6069978B-047B-4F99-B3C047927768317B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6069978B-047B-4F99-B3C047927768317B_source.gif?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="1880-12-11">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/12-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/ADF94243-6DED-44E1-A7783EF55ED1A5DC_source.gif?w=600" alt="SA Supplements Vol 10 Issue 257supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/ADF94243-6DED-44E1-A7783EF55ED1A5DC_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/ADF94243-6DED-44E1-A7783EF55ED1A5DC_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="1880-12-04">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/12-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3C1FBD37-4850-4749-AED978401AF66594_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 23" srcSet="https://static.scientificamerican.com/sciam/cache/file/3C1FBD37-4850-4749-AED978401AF66594_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3C1FBD37-4850-4749-AED978401AF66594_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="1880-12-04">December 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/11-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E7B2BEE1-DEE0-4A82-9791C449D7772B7B_source.gif?w=600" alt="SA Supplements Vol 10 Issue 256supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/E7B2BEE1-DEE0-4A82-9791C449D7772B7B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E7B2BEE1-DEE0-4A82-9791C449D7772B7B_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="1880-11-27">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/11-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5A2F80C3-D30E-45A5-910B9E4AE425E84B_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 22" srcSet="https://static.scientificamerican.com/sciam/cache/file/5A2F80C3-D30E-45A5-910B9E4AE425E84B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5A2F80C3-D30E-45A5-910B9E4AE425E84B_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="1880-11-27">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/11-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B8856F1C-31F6-448D-804B67BC229040FD_source.gif?w=600" alt="SA Supplements Vol 10 Issue 255supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B8856F1C-31F6-448D-804B67BC229040FD_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B8856F1C-31F6-448D-804B67BC229040FD_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="1880-11-20">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/11-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D162CCAF-1519-46A4-9E7837A8FA38C1B1_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 21" srcSet="https://static.scientificamerican.com/sciam/cache/file/D162CCAF-1519-46A4-9E7837A8FA38C1B1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D162CCAF-1519-46A4-9E7837A8FA38C1B1_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="1880-11-20">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/11-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3C0216E7-640B-40D6-87EC4034D02AD2C4_source.gif?w=600" alt="SA Supplements Vol 10 Issue 254supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3C0216E7-640B-40D6-87EC4034D02AD2C4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3C0216E7-640B-40D6-87EC4034D02AD2C4_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="1880-11-13">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/11-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5A9894E3-44C4-45BD-B820540EC66BEE26_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 20" srcSet="https://static.scientificamerican.com/sciam/cache/file/5A9894E3-44C4-45BD-B820540EC66BEE26_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5A9894E3-44C4-45BD-B820540EC66BEE26_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="1880-11-13">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/11-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C6FF2576-E34D-4686-B1C1DF9E64032B2B_source.gif?w=600" alt="SA Supplements Vol 10 Issue 253supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C6FF2576-E34D-4686-B1C1DF9E64032B2B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C6FF2576-E34D-4686-B1C1DF9E64032B2B_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="1880-11-06">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/11-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2220DA8B-6397-43AF-8E442D8B70138892_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 19" srcSet="https://static.scientificamerican.com/sciam/cache/file/2220DA8B-6397-43AF-8E442D8B70138892_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2220DA8B-6397-43AF-8E442D8B70138892_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="1880-11-06">November 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/10-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/07D5BE2A-280A-4A51-90466602B6D66BD5_source.gif?w=600" alt="SA Supplements Vol 10 Issue 252supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/07D5BE2A-280A-4A51-90466602B6D66BD5_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/07D5BE2A-280A-4A51-90466602B6D66BD5_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="1880-10-30">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/10-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1D9F5B7A-CACF-43C4-81C185D972F22D5E_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 18" srcSet="https://static.scientificamerican.com/sciam/cache/file/1D9F5B7A-CACF-43C4-81C185D972F22D5E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1D9F5B7A-CACF-43C4-81C185D972F22D5E_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="1880-10-30">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/10-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1D2C493E-6436-4EE3-B17B913618A90855_source.gif?w=600" alt="SA Supplements Vol 10 Issue 251supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/1D2C493E-6436-4EE3-B17B913618A90855_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1D2C493E-6436-4EE3-B17B913618A90855_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="1880-10-23">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/10-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2EA7C13E-7E54-4981-9205690D350EE54E_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 17" srcSet="https://static.scientificamerican.com/sciam/cache/file/2EA7C13E-7E54-4981-9205690D350EE54E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2EA7C13E-7E54-4981-9205690D350EE54E_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="1880-10-23">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/10-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/440B8FF3-E640-485F-A6F28D670E976350_source.gif?w=600" alt="SA Supplements Vol 10 Issue 250supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/440B8FF3-E640-485F-A6F28D670E976350_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/440B8FF3-E640-485F-A6F28D670E976350_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="1880-10-16">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/10-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/ADA21E2C-D5BE-49CD-A3D0FFCDFD711E40_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/ADA21E2C-D5BE-49CD-A3D0FFCDFD711E40_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/ADA21E2C-D5BE-49CD-A3D0FFCDFD711E40_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="1880-10-16">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/10-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A3D67190-13B0-414A-96BEC56D07562AD9_source.gif?w=600" alt="SA Supplements Vol 10 Issue 249supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A3D67190-13B0-414A-96BEC56D07562AD9_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A3D67190-13B0-414A-96BEC56D07562AD9_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="1880-10-09">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/10-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/87965C7E-086B-4F34-82F0D23231F94328_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 15" srcSet="https://static.scientificamerican.com/sciam/cache/file/87965C7E-086B-4F34-82F0D23231F94328_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/87965C7E-086B-4F34-82F0D23231F94328_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="1880-10-09">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/10-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C91B6D0C-D947-49D5-B6EC1A0DD0995871_source.gif?w=600" alt="SA Supplements Vol 10 Issue 248supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C91B6D0C-D947-49D5-B6EC1A0DD0995871_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C91B6D0C-D947-49D5-B6EC1A0DD0995871_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="1880-10-02">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/10-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/7E65DC89-21E9-4D17-991493C9D30E767D_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 14" srcSet="https://static.scientificamerican.com/sciam/cache/file/7E65DC89-21E9-4D17-991493C9D30E767D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/7E65DC89-21E9-4D17-991493C9D30E767D_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="1880-10-02">October 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/09-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CF6FFAFB-36D2-4293-B5A2DA32B6250F3A_source.gif?w=600" alt="SA Supplements Vol 10 Issue 247supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/CF6FFAFB-36D2-4293-B5A2DA32B6250F3A_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CF6FFAFB-36D2-4293-B5A2DA32B6250F3A_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="1880-09-25">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/09-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5F73D5A9-F7C7-4350-840C1E29DDDC896F_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 13" srcSet="https://static.scientificamerican.com/sciam/cache/file/5F73D5A9-F7C7-4350-840C1E29DDDC896F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5F73D5A9-F7C7-4350-840C1E29DDDC896F_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="1880-09-25">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/09-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BA0AB7EB-29E8-4799-BB043848BEA1C7BF_source.gif?w=600" alt="SA Supplements Vol 10 Issue 246supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/BA0AB7EB-29E8-4799-BB043848BEA1C7BF_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BA0AB7EB-29E8-4799-BB043848BEA1C7BF_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="1880-09-18">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/09-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A5E820F9-825B-4454-9EF2F5BAB736D4BE_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 12" srcSet="https://static.scientificamerican.com/sciam/cache/file/A5E820F9-825B-4454-9EF2F5BAB736D4BE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A5E820F9-825B-4454-9EF2F5BAB736D4BE_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="1880-09-18">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/09-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/85285442-C6CE-44CE-A573385880B2EDF9_source.gif?w=600" alt="SA Supplements Vol 10 Issue 245supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/85285442-C6CE-44CE-A573385880B2EDF9_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/85285442-C6CE-44CE-A573385880B2EDF9_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="1880-09-11">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/09-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A9EC80E8-7511-4006-B9B3BC64AF4E8240_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 11" srcSet="https://static.scientificamerican.com/sciam/cache/file/A9EC80E8-7511-4006-B9B3BC64AF4E8240_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A9EC80E8-7511-4006-B9B3BC64AF4E8240_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="1880-09-11">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/09-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8472F96B-9F2E-4E8F-82C78CFA5704064B_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 10" srcSet="https://static.scientificamerican.com/sciam/cache/file/8472F96B-9F2E-4E8F-82C78CFA5704064B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8472F96B-9F2E-4E8F-82C78CFA5704064B_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="1880-09-04">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/09-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/68BB9038-5EB1-49CC-966B77F0637D2258_source.gif?w=600" alt="SA Supplements Vol 10 Issue 244supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/68BB9038-5EB1-49CC-966B77F0637D2258_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/68BB9038-5EB1-49CC-966B77F0637D2258_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="1880-09-04">September 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/08-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1B4C2161-FEFD-4059-A476DC65AC7ACA1A_source.gif?w=600" alt="SA Supplements Vol 10 Issue 243supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/1B4C2161-FEFD-4059-A476DC65AC7ACA1A_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1B4C2161-FEFD-4059-A476DC65AC7ACA1A_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="1880-08-28">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/08-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F0995DA8-4E4B-428D-AD4D63F05BE712DA_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 9" srcSet="https://static.scientificamerican.com/sciam/cache/file/F0995DA8-4E4B-428D-AD4D63F05BE712DA_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F0995DA8-4E4B-428D-AD4D63F05BE712DA_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="1880-08-28">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/08-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/47486CFA-1C1C-496F-BDF37FB6EEB57758_source.gif?w=600" alt="SA Supplements Vol 10 Issue 242supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/47486CFA-1C1C-496F-BDF37FB6EEB57758_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/47486CFA-1C1C-496F-BDF37FB6EEB57758_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="1880-08-21">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/08-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/02B117A6-FEA1-4F6C-8383BB1BFD6F680C_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 8" srcSet="https://static.scientificamerican.com/sciam/cache/file/02B117A6-FEA1-4F6C-8383BB1BFD6F680C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/02B117A6-FEA1-4F6C-8383BB1BFD6F680C_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="1880-08-21">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/08-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/65C66DA4-1256-4BCB-BCADD7516C070E8E_source.gif?w=600" alt="SA Supplements Vol 10 Issue 241supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/65C66DA4-1256-4BCB-BCADD7516C070E8E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/65C66DA4-1256-4BCB-BCADD7516C070E8E_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="1880-08-14">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/08-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D2E426B4-0BE9-44AE-82ECFEF965AAA5B2_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 7" srcSet="https://static.scientificamerican.com/sciam/cache/file/D2E426B4-0BE9-44AE-82ECFEF965AAA5B2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D2E426B4-0BE9-44AE-82ECFEF965AAA5B2_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="1880-08-14">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/08-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9A5F163E-11D6-4CCB-AFD73AB00CA562A0_source.gif?w=600" alt="SA Supplements Vol 10 Issue 240supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/9A5F163E-11D6-4CCB-AFD73AB00CA562A0_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9A5F163E-11D6-4CCB-AFD73AB00CA562A0_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="1880-08-07">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/08-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E78FB712-8545-4E0C-BCB438C0E0254CEB_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/E78FB712-8545-4E0C-BCB438C0E0254CEB_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E78FB712-8545-4E0C-BCB438C0E0254CEB_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="1880-08-07">August 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/07-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A689DAEF-E985-4D09-B5E20F75DD999675_source.gif?w=600" alt="SA Supplements Vol 10 Issue 239supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A689DAEF-E985-4D09-B5E20F75DD999675_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A689DAEF-E985-4D09-B5E20F75DD999675_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="1880-07-31">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/07-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D9F436BD-6075-457C-81FFFE2D7135741E_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/D9F436BD-6075-457C-81FFFE2D7135741E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D9F436BD-6075-457C-81FFFE2D7135741E_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="1880-07-31">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/07-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2FB9073A-F005-410B-86B540F6D27E1D29_source.gif?w=600" alt="SA Supplements Vol 10 Issue 238supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2FB9073A-F005-410B-86B540F6D27E1D29_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2FB9073A-F005-410B-86B540F6D27E1D29_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="1880-07-24">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/07-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B3FA73F6-B18B-400C-A0F2D82A281AC623_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/B3FA73F6-B18B-400C-A0F2D82A281AC623_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B3FA73F6-B18B-400C-A0F2D82A281AC623_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="1880-07-24">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/07-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A22BBCF6-99D1-4AA9-8CF38750472EAA28_source.gif?w=600" alt="SA Supplements Vol 10 Issue 237supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A22BBCF6-99D1-4AA9-8CF38750472EAA28_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A22BBCF6-99D1-4AA9-8CF38750472EAA28_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="1880-07-17">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/07-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/4329DBB2-E8DA-4AA9-A74E37EF2BA66D4E_source.gif?w=600" alt="Scientific American Magazine Vol 43 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/4329DBB2-E8DA-4AA9-A74E37EF2BA66D4E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/4329DBB2-E8DA-4AA9-A74E37EF2BA66D4E_source.gif?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="1880-07-17">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/07-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/25A6A91A-53A5-48D2-A4C7729BE020B232_source.gif?w=600" alt="SA Supplements Vol 10 Issue 236supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/25A6A91A-53A5-48D2-A4C7729BE020B232_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/25A6A91A-53A5-48D2-A4C7729BE020B232_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="1880-07-10">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/07-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/709E6603-8610-4A8F-B543A413C773645B_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/709E6603-8610-4A8F-B543A413C773645B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/709E6603-8610-4A8F-B543A413C773645B_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="1880-07-10">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/07-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C2E024B8-49E8-4597-8C2D4BB1B895D8EC_source.gif?w=600" alt="SA Supplements Vol 10 Issue 235supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C2E024B8-49E8-4597-8C2D4BB1B895D8EC_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C2E024B8-49E8-4597-8C2D4BB1B895D8EC_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="1880-07-03">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/07-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/69C00C69-336B-4367-AA4D09482DA93607_source.jpg?w=600" alt="Scientific American Magazine Vol 43 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/69C00C69-336B-4367-AA4D09482DA93607_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/69C00C69-336B-4367-AA4D09482DA93607_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="1880-07-03">July 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/06-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/4DF32D6C-E0BD-4419-983E3564AA37A034_source.gif?w=600" alt="SA Supplements Vol 9 Issue 234supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/4DF32D6C-E0BD-4419-983E3564AA37A034_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/4DF32D6C-E0BD-4419-983E3564AA37A034_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="1880-06-26">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/06-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E86FAE0E-E6F0-4D55-BAD627C1A089710A_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 26" srcSet="https://static.scientificamerican.com/sciam/cache/file/E86FAE0E-E6F0-4D55-BAD627C1A089710A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E86FAE0E-E6F0-4D55-BAD627C1A089710A_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="1880-06-26">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/06-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/61EADAEA-83A5-4269-8096E732ECD47AEF_source.gif?w=600" alt="SA Supplements Vol 9 Issue 233supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/61EADAEA-83A5-4269-8096E732ECD47AEF_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/61EADAEA-83A5-4269-8096E732ECD47AEF_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="1880-06-19">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/06-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/99BCC7E1-1833-4E8E-949560D38EA76A11_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 25" srcSet="https://static.scientificamerican.com/sciam/cache/file/99BCC7E1-1833-4E8E-949560D38EA76A11_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/99BCC7E1-1833-4E8E-949560D38EA76A11_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="1880-06-19">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/06-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3FF4DA61-1C09-4271-88564ED307C1C729_source.gif?w=600" alt="SA Supplements Vol 9 Issue 232supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3FF4DA61-1C09-4271-88564ED307C1C729_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3FF4DA61-1C09-4271-88564ED307C1C729_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="1880-06-12">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/06-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C93B7A88-E01C-460C-BDCD93398C5D25B1_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 24" srcSet="https://static.scientificamerican.com/sciam/cache/file/C93B7A88-E01C-460C-BDCD93398C5D25B1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C93B7A88-E01C-460C-BDCD93398C5D25B1_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="1880-06-12">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/06-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/4CB148E4-4326-4615-889AFB817654AB70_source.gif?w=600" alt="SA Supplements Vol 9 Issue 231supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/4CB148E4-4326-4615-889AFB817654AB70_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/4CB148E4-4326-4615-889AFB817654AB70_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="1880-06-05">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/06-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2D3D876D-7636-41D3-8AAB8DBF8CFEBDF1_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 23" srcSet="https://static.scientificamerican.com/sciam/cache/file/2D3D876D-7636-41D3-8AAB8DBF8CFEBDF1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2D3D876D-7636-41D3-8AAB8DBF8CFEBDF1_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="1880-06-05">June 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/05-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3CC582C7-2B30-4771-AC05A4F2ED6F9CE1_source.gif?w=600" alt="SA Supplements Vol 9 Issue 230supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3CC582C7-2B30-4771-AC05A4F2ED6F9CE1_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3CC582C7-2B30-4771-AC05A4F2ED6F9CE1_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="1880-05-29">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/05-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/95207841-36CB-4DBB-ADE7C065EDB94C14_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 22" srcSet="https://static.scientificamerican.com/sciam/cache/file/95207841-36CB-4DBB-ADE7C065EDB94C14_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/95207841-36CB-4DBB-ADE7C065EDB94C14_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="1880-05-29">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/05-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6D93F9E4-EE6D-4A66-B95773B670938658_source.gif?w=600" alt="SA Supplements Vol 9 Issue 229supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/6D93F9E4-EE6D-4A66-B95773B670938658_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6D93F9E4-EE6D-4A66-B95773B670938658_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="1880-05-22">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/05-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/199D1135-8FD8-4F8C-9FF3750FDAC40346_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 21" srcSet="https://static.scientificamerican.com/sciam/cache/file/199D1135-8FD8-4F8C-9FF3750FDAC40346_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/199D1135-8FD8-4F8C-9FF3750FDAC40346_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="1880-05-22">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/05-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2F1C312F-5D96-4FAC-B1F16ABFED04E651_source.gif?w=600" alt="SA Supplements Vol 9 Issue 228supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2F1C312F-5D96-4FAC-B1F16ABFED04E651_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2F1C312F-5D96-4FAC-B1F16ABFED04E651_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="1880-05-15">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/05-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/817A5E13-6A07-485E-875208AAD52C6129_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 20" srcSet="https://static.scientificamerican.com/sciam/cache/file/817A5E13-6A07-485E-875208AAD52C6129_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/817A5E13-6A07-485E-875208AAD52C6129_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="1880-05-15">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/05-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0A3DC410-EA81-4CDA-8178E061CE68BE91_source.gif?w=600" alt="SA Supplements Vol 9 Issue 227supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0A3DC410-EA81-4CDA-8178E061CE68BE91_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0A3DC410-EA81-4CDA-8178E061CE68BE91_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="1880-05-08">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/05-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AAE4066C-2040-4135-A906FD9427C48884_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 19" srcSet="https://static.scientificamerican.com/sciam/cache/file/AAE4066C-2040-4135-A906FD9427C48884_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AAE4066C-2040-4135-A906FD9427C48884_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="1880-05-08">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2AD042C3-5806-4B27-A2401062C6D38D1C_source.gif?w=600" alt="SA Supplements Vol 9 Issue 226supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2AD042C3-5806-4B27-A2401062C6D38D1C_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2AD042C3-5806-4B27-A2401062C6D38D1C_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="1880-05-01">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/59391A36-DDE0-46A0-8AC12225FE8CBBE6_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 18" srcSet="https://static.scientificamerican.com/sciam/cache/file/59391A36-DDE0-46A0-8AC12225FE8CBBE6_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/59391A36-DDE0-46A0-8AC12225FE8CBBE6_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="1880-05-01">May 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/04-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/700C0200-86B5-46C7-A706662C7EE486D0_source.gif?w=600" alt="SA Supplements Vol 9 Issue 225supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/700C0200-86B5-46C7-A706662C7EE486D0_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/700C0200-86B5-46C7-A706662C7EE486D0_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="1880-04-24">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/04-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/301193FF-D1CF-4E54-9E52509E7BD27E15_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 17" srcSet="https://static.scientificamerican.com/sciam/cache/file/301193FF-D1CF-4E54-9E52509E7BD27E15_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/301193FF-D1CF-4E54-9E52509E7BD27E15_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="1880-04-24">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/04-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5D6FA4C4-4C55-46B7-9888297272574BB4_source.gif?w=600" alt="SA Supplements Vol 9 Issue 224supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/5D6FA4C4-4C55-46B7-9888297272574BB4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5D6FA4C4-4C55-46B7-9888297272574BB4_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="1880-04-17">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/04-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/62DCC8B1-58E5-4DFA-85AD9366BE00DBFD_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/62DCC8B1-58E5-4DFA-85AD9366BE00DBFD_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/62DCC8B1-58E5-4DFA-85AD9366BE00DBFD_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="1880-04-17">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/04-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/7B7BB447-14A7-4EEA-8E790A6614EC4A5E_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 15" srcSet="https://static.scientificamerican.com/sciam/cache/file/7B7BB447-14A7-4EEA-8E790A6614EC4A5E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/7B7BB447-14A7-4EEA-8E790A6614EC4A5E_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="1880-04-10">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/04-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/FFEFC002-8E3D-4281-B090B1D64D4FFB85_source.gif?w=600" alt="SA Supplements Vol 9 Issue 223supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/FFEFC002-8E3D-4281-B090B1D64D4FFB85_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/FFEFC002-8E3D-4281-B090B1D64D4FFB85_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="1880-04-10">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/04-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/62833818-590E-4AF2-9C90829254212D68_source.gif?w=600" alt="SA Supplements Vol 9 Issue 222supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/62833818-590E-4AF2-9C90829254212D68_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/62833818-590E-4AF2-9C90829254212D68_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="1880-04-03">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/04-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/64183444-DF56-4016-A20D021732974499_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 14" srcSet="https://static.scientificamerican.com/sciam/cache/file/64183444-DF56-4016-A20D021732974499_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/64183444-DF56-4016-A20D021732974499_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="1880-04-03">April 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/03-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/CC332246-373E-44E5-8FA6B1009966AFF7_source.gif?w=600" alt="SA Supplements Vol 9 Issue 221supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/CC332246-373E-44E5-8FA6B1009966AFF7_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/CC332246-373E-44E5-8FA6B1009966AFF7_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="1880-03-27">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/03-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C3FB0F17-BBF9-45B8-9ABBC44E62A023DF_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 13" srcSet="https://static.scientificamerican.com/sciam/cache/file/C3FB0F17-BBF9-45B8-9ABBC44E62A023DF_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C3FB0F17-BBF9-45B8-9ABBC44E62A023DF_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="1880-03-27">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/03-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/96C73A50-B813-4CB7-86223C65ED6A7FFA_source.gif?w=600" alt="SA Supplements Vol 9 Issue 220supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/96C73A50-B813-4CB7-86223C65ED6A7FFA_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/96C73A50-B813-4CB7-86223C65ED6A7FFA_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="1880-03-20">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/03-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A5BA4981-6882-4127-A4362D3DFF445832_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 12" srcSet="https://static.scientificamerican.com/sciam/cache/file/A5BA4981-6882-4127-A4362D3DFF445832_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A5BA4981-6882-4127-A4362D3DFF445832_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="1880-03-20">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/03-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/EC7BC668-BE6D-4635-A2BD0C22C628FF60_source.gif?w=600" alt="SA Supplements Vol 9 Issue 219supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/EC7BC668-BE6D-4635-A2BD0C22C628FF60_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/EC7BC668-BE6D-4635-A2BD0C22C628FF60_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="1880-03-13">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/03-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/40FE6F5C-9A3F-44C1-9CFC8E25C1A551E6_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 11" srcSet="https://static.scientificamerican.com/sciam/cache/file/40FE6F5C-9A3F-44C1-9CFC8E25C1A551E6_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/40FE6F5C-9A3F-44C1-9CFC8E25C1A551E6_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="1880-03-13">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/03-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F4A620C9-7E6F-43C0-A327924165115BBB_source.gif?w=600" alt="SA Supplements Vol 9 Issue 218supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/F4A620C9-7E6F-43C0-A327924165115BBB_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F4A620C9-7E6F-43C0-A327924165115BBB_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="1880-03-06">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/03-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A73D6593-96B6-498A-BDB19A26A5EACB1E_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 10" srcSet="https://static.scientificamerican.com/sciam/cache/file/A73D6593-96B6-498A-BDB19A26A5EACB1E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A73D6593-96B6-498A-BDB19A26A5EACB1E_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="1880-03-06">March 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/02-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B648483C-8C52-4C95-9A605506B41493CE_source.gif?w=600" alt="SA Supplements Vol 9 Issue 217supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B648483C-8C52-4C95-9A605506B41493CE_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B648483C-8C52-4C95-9A605506B41493CE_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="1880-02-28">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/02-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/01D5B2E4-1A82-40B9-A08ED2350C60906D_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 9" srcSet="https://static.scientificamerican.com/sciam/cache/file/01D5B2E4-1A82-40B9-A08ED2350C60906D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/01D5B2E4-1A82-40B9-A08ED2350C60906D_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="1880-02-28">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/02-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F03225A9-3CA4-457F-854318D48FFEA8DC_source.gif?w=600" alt="SA Supplements Vol 9 Issue 216supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/F03225A9-3CA4-457F-854318D48FFEA8DC_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F03225A9-3CA4-457F-854318D48FFEA8DC_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="1880-02-21">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/02-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/85CE0774-E0EB-4558-88370E933F790248_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 8" srcSet="https://static.scientificamerican.com/sciam/cache/file/85CE0774-E0EB-4558-88370E933F790248_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/85CE0774-E0EB-4558-88370E933F790248_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="1880-02-21">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/02-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A07269B2-AA8C-44C0-BE7CE5B622DFA263_source.gif?w=600" alt="SA Supplements Vol 9 Issue 215supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A07269B2-AA8C-44C0-BE7CE5B622DFA263_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A07269B2-AA8C-44C0-BE7CE5B622DFA263_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="1880-02-14">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/02-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9E846FE8-936D-40A4-B87284DD34748666_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 7" srcSet="https://static.scientificamerican.com/sciam/cache/file/9E846FE8-936D-40A4-B87284DD34748666_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9E846FE8-936D-40A4-B87284DD34748666_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="1880-02-14">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/02-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C46D66EC-AE9A-4226-AB255C62DC1A1931_source.gif?w=600" alt="SA Supplements Vol 9 Issue 214supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C46D66EC-AE9A-4226-AB255C62DC1A1931_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C46D66EC-AE9A-4226-AB255C62DC1A1931_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="1880-02-07">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/02-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8987BF0C-A532-42D8-A93000E2B134CDC4_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/8987BF0C-A532-42D8-A93000E2B134CDC4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8987BF0C-A532-42D8-A93000E2B134CDC4_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="1880-02-07">February 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/01-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/77CE75B3-7153-4A47-9DF33B7A41DEF730_source.gif?w=600" alt="SA Supplements Vol 9 Issue 213supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/77CE75B3-7153-4A47-9DF33B7A41DEF730_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/77CE75B3-7153-4A47-9DF33B7A41DEF730_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="1880-01-31">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/01-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/24CC82F2-BE6C-4F51-A7DD15F9617766B9_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/24CC82F2-BE6C-4F51-A7DD15F9617766B9_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/24CC82F2-BE6C-4F51-A7DD15F9617766B9_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="1880-01-31">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/01-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0003377F-94F3-4860-A957E1185792A05D_source.gif?w=600" alt="SA Supplements Vol 9 Issue 212supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0003377F-94F3-4860-A957E1185792A05D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0003377F-94F3-4860-A957E1185792A05D_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="1880-01-24">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/01-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/125D23FF-84AC-4BD2-8EC105003BFAC172_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/125D23FF-84AC-4BD2-8EC105003BFAC172_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/125D23FF-84AC-4BD2-8EC105003BFAC172_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="1880-01-24">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/01-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0C96FE37-7376-4C68-967DDC101C35F631_source.gif?w=600" alt="SA Supplements Vol 9 Issue 211supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0C96FE37-7376-4C68-967DDC101C35F631_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0C96FE37-7376-4C68-967DDC101C35F631_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="1880-01-17">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1880/01-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1EDBCEE7-73DA-49E9-A22930B31E913A81_source.jpg?w=600" alt="Scientific American Magazine Vol 42 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/1EDBCEE7-73DA-49E9-A22930B31E913A81_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1EDBCEE7-73DA-49E9-A22930B31E913A81_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="1880-01-17">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/01-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/247A249D-773E-4B11-8FEB7C3BF96A9C3A_source.gif?w=600" alt="SA Supplements Vol 9 Issue 210supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/247A249D-773E-4B11-8FEB7C3BF96A9C3A_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="1880-01-10">January 1880</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1880/01-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0C9AD8B7-474E-401E-B2DB3FE5E7C4F9DB_source.gif?w=600" alt="SA Supplements Vol 9 Issue 209supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0C9AD8B7-474E-401E-B2DB3FE5E7C4F9DB_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0C9AD8B7-474E-401E-B2DB3FE5E7C4F9DB_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 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