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Issue Archive: 1894 | Scientific American
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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></div></div></div><div class="issue__list-8JHD2"><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/12-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2A40157B-767D-4F46-A795FA64738309FC_source.gif?w=600" alt="SA Supplements Vol 38 Issue 991supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2A40157B-767D-4F46-A795FA64738309FC_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2A40157B-767D-4F46-A795FA64738309FC_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="1894-12-29">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/12-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9E8BD673-28A3-4DE1-9046DD04F2077926_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 26" srcSet="https://static.scientificamerican.com/sciam/cache/file/9E8BD673-28A3-4DE1-9046DD04F2077926_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9E8BD673-28A3-4DE1-9046DD04F2077926_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="1894-12-29">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/12-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/674608FE-0062-4F7C-9BF0876AF6F689CC_source.gif?w=600" alt="SA Supplements Vol 38 Issue 990supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/674608FE-0062-4F7C-9BF0876AF6F689CC_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/674608FE-0062-4F7C-9BF0876AF6F689CC_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="1894-12-22">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/12-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A3ADBC5B-132F-4F1A-8D95576F5FC1B64A_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 25" srcSet="https://static.scientificamerican.com/sciam/cache/file/A3ADBC5B-132F-4F1A-8D95576F5FC1B64A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A3ADBC5B-132F-4F1A-8D95576F5FC1B64A_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="1894-12-22">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/12-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A1A4F18E-BA76-476B-86DC26B4660FF8F1_source.gif?w=600" alt="SA Supplements Vol 38 Issue 989supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A1A4F18E-BA76-476B-86DC26B4660FF8F1_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A1A4F18E-BA76-476B-86DC26B4660FF8F1_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="1894-12-15">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/12-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/96931BE1-2C00-42F0-953B53D2AF070FD2_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 24" srcSet="https://static.scientificamerican.com/sciam/cache/file/96931BE1-2C00-42F0-953B53D2AF070FD2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/96931BE1-2C00-42F0-953B53D2AF070FD2_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="1894-12-15">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/12-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B06D3261-6E75-4597-B64822C4CBEC0BAE_source.gif?w=600" alt="SA Supplements Vol 38 Issue 988supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B06D3261-6E75-4597-B64822C4CBEC0BAE_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B06D3261-6E75-4597-B64822C4CBEC0BAE_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="1894-12-08">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/12-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3181090C-244A-471B-B7D034A2E6BB56CB_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 23" srcSet="https://static.scientificamerican.com/sciam/cache/file/3181090C-244A-471B-B7D034A2E6BB56CB_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3181090C-244A-471B-B7D034A2E6BB56CB_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="1894-12-08">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3480AE80-78A8-4EEA-931DE90B44D59A8F_source.gif?w=600" alt="SA Supplements Vol 38 Issue 987supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/3480AE80-78A8-4EEA-931DE90B44D59A8F_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3480AE80-78A8-4EEA-931DE90B44D59A8F_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="1894-12-01">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/12-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/458CBEE5-E477-4057-BF9E4E04BBFFBD0C_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 22" srcSet="https://static.scientificamerican.com/sciam/cache/file/458CBEE5-E477-4057-BF9E4E04BBFFBD0C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/458CBEE5-E477-4057-BF9E4E04BBFFBD0C_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="1894-12-01">December 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/11-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C619F2E9-626E-40ED-86AE9A7CD0E30422_source.gif?w=600" alt="SA Supplements Vol 38 Issue 986supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C619F2E9-626E-40ED-86AE9A7CD0E30422_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C619F2E9-626E-40ED-86AE9A7CD0E30422_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="1894-11-24">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/11-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/79E94C9A-024A-4C1C-8DD388006147CF3B_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 21" srcSet="https://static.scientificamerican.com/sciam/cache/file/79E94C9A-024A-4C1C-8DD388006147CF3B_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/79E94C9A-024A-4C1C-8DD388006147CF3B_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="1894-11-24">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/11-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/BE36E4D4-628F-4669-BF7BF7A82B731877_source.gif?w=600" alt="SA Supplements Vol 38 Issue 985supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/BE36E4D4-628F-4669-BF7BF7A82B731877_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/BE36E4D4-628F-4669-BF7BF7A82B731877_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="1894-11-17">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/11-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/50742C6E-876A-433B-B6A114BDA052D8A2_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 20" srcSet="https://static.scientificamerican.com/sciam/cache/file/50742C6E-876A-433B-B6A114BDA052D8A2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/50742C6E-876A-433B-B6A114BDA052D8A2_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="1894-11-17">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/11-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0D0225D5-D4DB-40F1-9151F81073B95598_source.gif?w=600" alt="SA Supplements Vol 38 Issue 984supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/0D0225D5-D4DB-40F1-9151F81073B95598_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0D0225D5-D4DB-40F1-9151F81073B95598_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="1894-11-10">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/11-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B25BD780-9D3A-4C6A-BAFA6CCB7CD2ECEC_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 19" srcSet="https://static.scientificamerican.com/sciam/cache/file/B25BD780-9D3A-4C6A-BAFA6CCB7CD2ECEC_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B25BD780-9D3A-4C6A-BAFA6CCB7CD2ECEC_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="1894-11-10">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/11-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/7AE4D92A-A456-4A5B-8F477882F9EC0A27_source.gif?w=600" alt="SA Supplements Vol 38 Issue 983supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/7AE4D92A-A456-4A5B-8F477882F9EC0A27_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/7AE4D92A-A456-4A5B-8F477882F9EC0A27_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="1894-11-03">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/11-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/177AF83D-E7EB-4DF0-BCFEB0E2EC09C00C_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 18" srcSet="https://static.scientificamerican.com/sciam/cache/file/177AF83D-E7EB-4DF0-BCFEB0E2EC09C00C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/177AF83D-E7EB-4DF0-BCFEB0E2EC09C00C_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="1894-11-03">November 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/10-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/748CED54-4C2A-4406-BF354F9BE8D7070D_source.gif?w=600" alt="SA Supplements Vol 38 Issue 982supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/748CED54-4C2A-4406-BF354F9BE8D7070D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/748CED54-4C2A-4406-BF354F9BE8D7070D_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="1894-10-27">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/10-27/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/33878CC0-3192-4472-8494251A04709AD8_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 17" srcSet="https://static.scientificamerican.com/sciam/cache/file/33878CC0-3192-4472-8494251A04709AD8_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/33878CC0-3192-4472-8494251A04709AD8_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="1894-10-27">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/10-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/ABD05340-4DDB-4527-8D3B8022128A36EA_source.gif?w=600" alt="SA Supplements Vol 38 Issue 981supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/ABD05340-4DDB-4527-8D3B8022128A36EA_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/ABD05340-4DDB-4527-8D3B8022128A36EA_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="1894-10-20">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/10-20/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/3BE5F24A-36FC-478E-8213567ACF4D853A_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/3BE5F24A-36FC-478E-8213567ACF4D853A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/3BE5F24A-36FC-478E-8213567ACF4D853A_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="1894-10-20">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/10-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DD117DD0-E26F-4EDD-B76E829B32089CE9_source.gif?w=600" alt="SA Supplements Vol 38 Issue 980supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/DD117DD0-E26F-4EDD-B76E829B32089CE9_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DD117DD0-E26F-4EDD-B76E829B32089CE9_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="1894-10-13">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/10-13/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/850F15D5-B444-47E8-A342C44D3AD4E4ED_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 15" srcSet="https://static.scientificamerican.com/sciam/cache/file/850F15D5-B444-47E8-A342C44D3AD4E4ED_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/850F15D5-B444-47E8-A342C44D3AD4E4ED_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="1894-10-13">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/10-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/7B7DFB3C-9884-4E6E-8B9753C255E20164_source.gif?w=600" alt="SA Supplements Vol 38 Issue 979supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/7B7DFB3C-9884-4E6E-8B9753C255E20164_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/7B7DFB3C-9884-4E6E-8B9753C255E20164_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="1894-10-06">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/10-06/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C1CAF9A4-7B63-4566-A3FCFAC8CE6E3F5F_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 14" srcSet="https://static.scientificamerican.com/sciam/cache/file/C1CAF9A4-7B63-4566-A3FCFAC8CE6E3F5F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C1CAF9A4-7B63-4566-A3FCFAC8CE6E3F5F_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="1894-10-06">October 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/09-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/27FA5EBF-5485-4DBD-BB18FB379BCBA106_source.gif?w=600" alt="SA Supplements Vol 38 Issue 978supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/27FA5EBF-5485-4DBD-BB18FB379BCBA106_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/27FA5EBF-5485-4DBD-BB18FB379BCBA106_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="1894-09-29">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/09-29/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9B386809-117E-4983-B45709F6E6F6C68A_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 13" srcSet="https://static.scientificamerican.com/sciam/cache/file/9B386809-117E-4983-B45709F6E6F6C68A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9B386809-117E-4983-B45709F6E6F6C68A_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="1894-09-29">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/09-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D1E5241B-25E1-445A-A2C0EAD86ED6F772_source.gif?w=600" alt="SA Supplements Vol 38 Issue 977supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/D1E5241B-25E1-445A-A2C0EAD86ED6F772_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D1E5241B-25E1-445A-A2C0EAD86ED6F772_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="1894-09-22">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/09-22/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/05EEADDF-2E34-4DD0-B26783F0F2232B73_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 12" srcSet="https://static.scientificamerican.com/sciam/cache/file/05EEADDF-2E34-4DD0-B26783F0F2232B73_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/05EEADDF-2E34-4DD0-B26783F0F2232B73_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="1894-09-22">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/09-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/4158B665-44F9-4396-AEB37E364F63F9A4_source.gif?w=600" alt="SA Supplements Vol 38 Issue 976supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/4158B665-44F9-4396-AEB37E364F63F9A4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/4158B665-44F9-4396-AEB37E364F63F9A4_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="1894-09-15">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/09-15/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E26702A4-F69A-4027-8B13C52A53F84CFE_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 11" srcSet="https://static.scientificamerican.com/sciam/cache/file/E26702A4-F69A-4027-8B13C52A53F84CFE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E26702A4-F69A-4027-8B13C52A53F84CFE_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="1894-09-15">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/09-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/01AF6188-C465-4CD9-AF8C0EA9A072904C_source.gif?w=600" alt="SA Supplements Vol 38 Issue 975supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/01AF6188-C465-4CD9-AF8C0EA9A072904C_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/01AF6188-C465-4CD9-AF8C0EA9A072904C_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="1894-09-08">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/09-08/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2ED2F19E-6344-431A-A4FEF62FCCE95ABD_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 10" srcSet="https://static.scientificamerican.com/sciam/cache/file/2ED2F19E-6344-431A-A4FEF62FCCE95ABD_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2ED2F19E-6344-431A-A4FEF62FCCE95ABD_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="1894-09-08">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/84BC1E58-C389-46AF-B8944105E4DC37D8_source.gif?w=600" alt="SA Supplements Vol 38 Issue 974supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/84BC1E58-C389-46AF-B8944105E4DC37D8_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/84BC1E58-C389-46AF-B8944105E4DC37D8_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="1894-09-01">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/09-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1FC0C152-746F-4879-9AF06B0718102E52_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 9" srcSet="https://static.scientificamerican.com/sciam/cache/file/1FC0C152-746F-4879-9AF06B0718102E52_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1FC0C152-746F-4879-9AF06B0718102E52_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="1894-09-01">September 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/08-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9A1D1913-4D71-492F-99A7DFA7B2A5EA92_source.gif?w=600" alt="SA Supplements Vol 38 Issue 973supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/9A1D1913-4D71-492F-99A7DFA7B2A5EA92_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9A1D1913-4D71-492F-99A7DFA7B2A5EA92_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="1894-08-25">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/08-25/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0A61E2ED-4C74-4511-95D2639660A5BAB4_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 8" srcSet="https://static.scientificamerican.com/sciam/cache/file/0A61E2ED-4C74-4511-95D2639660A5BAB4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0A61E2ED-4C74-4511-95D2639660A5BAB4_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="1894-08-25">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/08-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/B8700F09-4A55-4F9E-A0BCB0B5D01EA098_source.gif?w=600" alt="SA Supplements Vol 38 Issue 972supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/B8700F09-4A55-4F9E-A0BCB0B5D01EA098_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/B8700F09-4A55-4F9E-A0BCB0B5D01EA098_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="1894-08-18">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/08-18/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9C6BE7C1-C77D-467B-95CF1000EAEE4A8A_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 7" srcSet="https://static.scientificamerican.com/sciam/cache/file/9C6BE7C1-C77D-467B-95CF1000EAEE4A8A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9C6BE7C1-C77D-467B-95CF1000EAEE4A8A_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="1894-08-18">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/08-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/101D7964-065C-4B84-8C5D531BA1730839_source.gif?w=600" alt="SA Supplements Vol 38 Issue 971supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/101D7964-065C-4B84-8C5D531BA1730839_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/101D7964-065C-4B84-8C5D531BA1730839_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="1894-08-11">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/08-11/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/8B28B00A-2319-49A8-99A097A1C203AF8F_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/8B28B00A-2319-49A8-99A097A1C203AF8F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/8B28B00A-2319-49A8-99A097A1C203AF8F_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="1894-08-11">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/08-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6C727FA8-423C-4629-B43D146B220522F5_source.gif?w=600" alt="SA Supplements Vol 38 Issue 970supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/6C727FA8-423C-4629-B43D146B220522F5_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6C727FA8-423C-4629-B43D146B220522F5_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="1894-08-04">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/08-04/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/13F39255-F22A-4489-A652D070DBCDF319_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 5" srcSet="https://static.scientificamerican.com/sciam/cache/file/13F39255-F22A-4489-A652D070DBCDF319_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/13F39255-F22A-4489-A652D070DBCDF319_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="1894-08-04">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/08-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/96B581AB-2523-4D63-9B8DED92AA6858AB_source.gif?w=600" alt="SA Builders Vol 18 Issue 2build" srcSet="https://static.scientificamerican.com/sciam/cache/file/96B581AB-2523-4D63-9B8DED92AA6858AB_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/96B581AB-2523-4D63-9B8DED92AA6858AB_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div class="issue__date-ozuG1"><time dateTime="1894-08-01">August 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/07-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2B58BCA0-ED2C-4B69-8CD693D47FC3DE6B_source.gif?w=600" alt="SA Supplements Vol 38 Issue 969supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2B58BCA0-ED2C-4B69-8CD693D47FC3DE6B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2B58BCA0-ED2C-4B69-8CD693D47FC3DE6B_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="1894-07-28">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/07-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F759DE1F-AE6C-4D2D-A4FB6D550D02B81D_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 4" srcSet="https://static.scientificamerican.com/sciam/cache/file/F759DE1F-AE6C-4D2D-A4FB6D550D02B81D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F759DE1F-AE6C-4D2D-A4FB6D550D02B81D_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="1894-07-28">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/07-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C51D22B8-516D-4DCD-88C6F94F6C9779D2_source.gif?w=600" alt="SA Supplements Vol 38 Issue 968supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C51D22B8-516D-4DCD-88C6F94F6C9779D2_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C51D22B8-516D-4DCD-88C6F94F6C9779D2_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="1894-07-21">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/07-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/46377B0D-0950-449B-91AC14E8127D2809_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 3" srcSet="https://static.scientificamerican.com/sciam/cache/file/46377B0D-0950-449B-91AC14E8127D2809_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/46377B0D-0950-449B-91AC14E8127D2809_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="1894-07-21">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/07-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/821951B6-4F43-4084-895531BF53F70663_source.gif?w=600" alt="SA Supplements Vol 38 Issue 967supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/821951B6-4F43-4084-895531BF53F70663_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/821951B6-4F43-4084-895531BF53F70663_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="1894-07-14">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/07-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D283E58A-4067-4F3D-83B7DC3587479CD0_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 2" srcSet="https://static.scientificamerican.com/sciam/cache/file/D283E58A-4067-4F3D-83B7DC3587479CD0_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D283E58A-4067-4F3D-83B7DC3587479CD0_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="1894-07-14">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/07-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C458547E-4BFA-436F-9B63BFA2DA76C4D4_source.gif?w=600" alt="SA Supplements Vol 38 Issue 966supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C458547E-4BFA-436F-9B63BFA2DA76C4D4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C458547E-4BFA-436F-9B63BFA2DA76C4D4_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="1894-07-07">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/07-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5FBA620C-41B9-435C-B006F8FF388D7888_source.jpg?w=600" alt="Scientific American Magazine Vol 71 Issue 1" srcSet="https://static.scientificamerican.com/sciam/cache/file/5FBA620C-41B9-435C-B006F8FF388D7888_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5FBA620C-41B9-435C-B006F8FF388D7888_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="1894-07-07">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/07-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/89AFB2DE-E5A8-4E37-9A55640D08C92391_source.gif?w=600" alt="SA Builders Vol 18 Issue 1build" srcSet="https://static.scientificamerican.com/sciam/cache/file/89AFB2DE-E5A8-4E37-9A55640D08C92391_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/89AFB2DE-E5A8-4E37-9A55640D08C92391_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div class="issue__date-ozuG1"><time dateTime="1894-07-01">July 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/06-30/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/41576020-C0A3-46A2-9061B78B8E95F19E_source.gif?w=600" alt="SA Supplements Vol 37 Issue 965supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/41576020-C0A3-46A2-9061B78B8E95F19E_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/41576020-C0A3-46A2-9061B78B8E95F19E_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="1894-06-30">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/06-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2E0A9907-7B82-4AF7-96782C3C9D6BFB44_source.gif?w=600" alt="SA Supplements Vol 37 Issue 964supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2E0A9907-7B82-4AF7-96782C3C9D6BFB44_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2E0A9907-7B82-4AF7-96782C3C9D6BFB44_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="1894-06-23">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/06-23/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DA101F0A-C81E-49D4-9B083C6147AABC8E_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 25" srcSet="https://static.scientificamerican.com/sciam/cache/file/DA101F0A-C81E-49D4-9B083C6147AABC8E_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DA101F0A-C81E-49D4-9B083C6147AABC8E_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="1894-06-23">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/06-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D1B7F8CB-01D1-449A-A38E2F1B3618D807_source.gif?w=600" alt="SA Supplements Vol 37 Issue 963supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/D1B7F8CB-01D1-449A-A38E2F1B3618D807_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D1B7F8CB-01D1-449A-A38E2F1B3618D807_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="1894-06-16">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/06-16/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5B56152C-C1FB-4174-95D7A5D3A88A5560_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 24" srcSet="https://static.scientificamerican.com/sciam/cache/file/5B56152C-C1FB-4174-95D7A5D3A88A5560_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5B56152C-C1FB-4174-95D7A5D3A88A5560_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="1894-06-16">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/06-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5A827924-5598-493E-829DBC991F5BAD1B_source.gif?w=600" alt="SA Supplements Vol 37 Issue 962supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/5A827924-5598-493E-829DBC991F5BAD1B_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5A827924-5598-493E-829DBC991F5BAD1B_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="1894-06-09">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/06-09/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F298CF8A-E865-423A-95DFF20154D9EB22_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 23" srcSet="https://static.scientificamerican.com/sciam/cache/file/F298CF8A-E865-423A-95DFF20154D9EB22_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F298CF8A-E865-423A-95DFF20154D9EB22_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="1894-06-09">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/06-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/29D8C350-E37B-472D-A946C858D0D1804D_source.gif?w=600" alt="SA Supplements Vol 37 Issue 961supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/29D8C350-E37B-472D-A946C858D0D1804D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/29D8C350-E37B-472D-A946C858D0D1804D_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="1894-06-02">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/06-02/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6F3E6013-E42E-4245-BE10A3BEBF24DFE4_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 22" srcSet="https://static.scientificamerican.com/sciam/cache/file/6F3E6013-E42E-4245-BE10A3BEBF24DFE4_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6F3E6013-E42E-4245-BE10A3BEBF24DFE4_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="1894-06-02">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/06-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9D679C6F-19AA-426A-9235808CADF5D41C_source.gif?w=600" alt="SA Builders Vol 17 Issue 6build" srcSet="https://static.scientificamerican.com/sciam/cache/file/9D679C6F-19AA-426A-9235808CADF5D41C_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9D679C6F-19AA-426A-9235808CADF5D41C_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div class="issue__date-ozuG1"><time dateTime="1894-06-01">June 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/05-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/11286440-0768-40AA-82799121A14F8B05_source.gif?w=600" alt="SA Supplements Vol 37 Issue 960supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/11286440-0768-40AA-82799121A14F8B05_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/11286440-0768-40AA-82799121A14F8B05_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="1894-05-26">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/05-26/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/41FE18EF-AC50-4C56-BC0ECBB1FE0EE67A_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 21" srcSet="https://static.scientificamerican.com/sciam/cache/file/41FE18EF-AC50-4C56-BC0ECBB1FE0EE67A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/41FE18EF-AC50-4C56-BC0ECBB1FE0EE67A_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="1894-05-26">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/05-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/97824452-234A-469A-92EAC062F0406E09_source.gif?w=600" alt="SA Supplements Vol 37 Issue 959supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/97824452-234A-469A-92EAC062F0406E09_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/97824452-234A-469A-92EAC062F0406E09_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="1894-05-19">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/05-19/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9F8E34DF-8119-4176-96BE3C762447E87D_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 20" srcSet="https://static.scientificamerican.com/sciam/cache/file/9F8E34DF-8119-4176-96BE3C762447E87D_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9F8E34DF-8119-4176-96BE3C762447E87D_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="1894-05-19">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/05-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/5415BEAD-35A7-424A-9399FCD9F903510F_source.gif?w=600" alt="SA Supplements Vol 37 Issue 958supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/5415BEAD-35A7-424A-9399FCD9F903510F_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/5415BEAD-35A7-424A-9399FCD9F903510F_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="1894-05-12">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/05-12/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/69CF74EE-B8B7-443E-B656A6198C30155F_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 19" srcSet="https://static.scientificamerican.com/sciam/cache/file/69CF74EE-B8B7-443E-B656A6198C30155F_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/69CF74EE-B8B7-443E-B656A6198C30155F_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="1894-05-12">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/05-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AF969690-F82A-4189-9A7B0C8D401E8C3D_source.gif?w=600" alt="SA Supplements Vol 37 Issue 957supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/AF969690-F82A-4189-9A7B0C8D401E8C3D_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AF969690-F82A-4189-9A7B0C8D401E8C3D_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="1894-05-05">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/05-05/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/04D66FF6-FB2E-4BA2-A39BB91BEB126577_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 18" srcSet="https://static.scientificamerican.com/sciam/cache/file/04D66FF6-FB2E-4BA2-A39BB91BEB126577_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/04D66FF6-FB2E-4BA2-A39BB91BEB126577_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="1894-05-05">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/05-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/409617F5-2533-4CF5-898F930AB4141CF3_source.gif?w=600" alt="SA Builders Vol 17 Issue 5build" srcSet="https://static.scientificamerican.com/sciam/cache/file/409617F5-2533-4CF5-898F930AB4141CF3_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/409617F5-2533-4CF5-898F930AB4141CF3_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div class="issue__date-ozuG1"><time dateTime="1894-05-01">May 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/04-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D1A82C67-1E06-4FBF-B0691F28F5BF9D46_source.gif?w=600" alt="SA Supplements Vol 37 Issue 956supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/D1A82C67-1E06-4FBF-B0691F28F5BF9D46_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D1A82C67-1E06-4FBF-B0691F28F5BF9D46_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="1894-04-28">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/04-28/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E1A680E0-9815-4C17-85470C877433F3C2_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 17" srcSet="https://static.scientificamerican.com/sciam/cache/file/E1A680E0-9815-4C17-85470C877433F3C2_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E1A680E0-9815-4C17-85470C877433F3C2_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="1894-04-28">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/04-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/9A2F3CE3-9153-4671-B18EE4DA30EAFED4_source.gif?w=600" alt="SA Supplements Vol 37 Issue 955supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/9A2F3CE3-9153-4671-B18EE4DA30EAFED4_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/9A2F3CE3-9153-4671-B18EE4DA30EAFED4_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="1894-04-21">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/04-21/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/11A71220-CE5A-4DB2-9941DBF0FAEF062A_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/11A71220-CE5A-4DB2-9941DBF0FAEF062A_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/11A71220-CE5A-4DB2-9941DBF0FAEF062A_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="1894-04-21">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/04-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A2667AE1-3BB6-4F91-9C4D304AF4350FAE_source.gif?w=600" alt="SA Supplements Vol 37 Issue 954supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A2667AE1-3BB6-4F91-9C4D304AF4350FAE_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A2667AE1-3BB6-4F91-9C4D304AF4350FAE_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="1894-04-14">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/04-14/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/827C969F-8517-4BCB-9414C06204B1A9FD_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 15" srcSet="https://static.scientificamerican.com/sciam/cache/file/827C969F-8517-4BCB-9414C06204B1A9FD_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/827C969F-8517-4BCB-9414C06204B1A9FD_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="1894-04-14">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/04-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/F7AC763D-842A-4A17-BD910BE655D3CC8F_source.gif?w=600" alt="SA Supplements Vol 37 Issue 953supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/F7AC763D-842A-4A17-BD910BE655D3CC8F_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/F7AC763D-842A-4A17-BD910BE655D3CC8F_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="1894-04-07">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/04-07/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/D009DBC3-6A1A-47D4-9F7B04264EFBCA89_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 14" srcSet="https://static.scientificamerican.com/sciam/cache/file/D009DBC3-6A1A-47D4-9F7B04264EFBCA89_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/D009DBC3-6A1A-47D4-9F7B04264EFBCA89_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="1894-04-07">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/04-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/0701A7B9-40C2-428A-900E0E7731983832_source.gif?w=600" alt="SA Builders Vol 17 Issue 4build" srcSet="https://static.scientificamerican.com/sciam/cache/file/0701A7B9-40C2-428A-900E0E7731983832_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/0701A7B9-40C2-428A-900E0E7731983832_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div class="issue__date-ozuG1"><time dateTime="1894-04-01">April 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/03-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AB46035E-1E13-4D9A-8EC7CFE8F38E62BF_source.gif?w=600" alt="SA Supplements Vol 37 Issue 952supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/AB46035E-1E13-4D9A-8EC7CFE8F38E62BF_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AB46035E-1E13-4D9A-8EC7CFE8F38E62BF_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="1894-03-31">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/03-31/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/E2D60AE6-F0D1-4262-9A1B9C13E1C945BB_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 13" srcSet="https://static.scientificamerican.com/sciam/cache/file/E2D60AE6-F0D1-4262-9A1B9C13E1C945BB_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/E2D60AE6-F0D1-4262-9A1B9C13E1C945BB_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="1894-03-31">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/03-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/04FD6CB9-7DEF-49E4-B9BA61C458E5E039_source.gif?w=600" alt="SA Supplements Vol 37 Issue 951supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/04FD6CB9-7DEF-49E4-B9BA61C458E5E039_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/04FD6CB9-7DEF-49E4-B9BA61C458E5E039_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="1894-03-24">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/03-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/427568FD-7A21-4A05-975A4C0C79E5D2EE_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 12" srcSet="https://static.scientificamerican.com/sciam/cache/file/427568FD-7A21-4A05-975A4C0C79E5D2EE_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/427568FD-7A21-4A05-975A4C0C79E5D2EE_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="1894-03-24">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/03-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6AAF2A71-EC39-487C-B3C45B1832BF4507_source.gif?w=600" alt="SA Supplements Vol 37 Issue 950supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/6AAF2A71-EC39-487C-B3C45B1832BF4507_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6AAF2A71-EC39-487C-B3C45B1832BF4507_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="1894-03-17">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/03-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AB686978-82E6-4663-B70425DC99797B86_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 11" srcSet="https://static.scientificamerican.com/sciam/cache/file/AB686978-82E6-4663-B70425DC99797B86_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AB686978-82E6-4663-B70425DC99797B86_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="1894-03-17">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/03-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/62C1E748-3A55-43FA-BEC2C659088DD4AB_source.gif?w=600" alt="SA Supplements Vol 37 Issue 949supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/62C1E748-3A55-43FA-BEC2C659088DD4AB_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/62C1E748-3A55-43FA-BEC2C659088DD4AB_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="1894-03-10">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/03-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/76446DA5-3287-47FD-BFA4731A3E46C1C1_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 10" srcSet="https://static.scientificamerican.com/sciam/cache/file/76446DA5-3287-47FD-BFA4731A3E46C1C1_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/76446DA5-3287-47FD-BFA4731A3E46C1C1_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="1894-03-10">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/03-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C676615B-6D64-44A3-BBCF5081ED67DDDE_source.gif?w=600" alt="SA Supplements Vol 37 Issue 948supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C676615B-6D64-44A3-BBCF5081ED67DDDE_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/C676615B-6D64-44A3-BBCF5081ED67DDDE_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="1894-03-03">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/03-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/1703B191-2857-45CE-AB15ED63F46EC8DC_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 9" srcSet="https://static.scientificamerican.com/sciam/cache/file/1703B191-2857-45CE-AB15ED63F46EC8DC_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/1703B191-2857-45CE-AB15ED63F46EC8DC_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="1894-03-03">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/03-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/DFA867FD-C9A5-41E5-A9DC3280886C90BB_source.gif?w=600" alt="SA Builders Vol 17 Issue 3build" srcSet="https://static.scientificamerican.com/sciam/cache/file/DFA867FD-C9A5-41E5-A9DC3280886C90BB_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/DFA867FD-C9A5-41E5-A9DC3280886C90BB_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div class="issue__date-ozuG1"><time dateTime="1894-03-01">March 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/02-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/83EFCDF7-AF7D-470B-98CE2E2DDD3D8C22_source.gif?w=600" alt="SA Supplements Vol 37 Issue 947supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/83EFCDF7-AF7D-470B-98CE2E2DDD3D8C22_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/83EFCDF7-AF7D-470B-98CE2E2DDD3D8C22_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="1894-02-24">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/02-24/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/FFE0FDE8-0279-478C-AE4818F629E35547_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 8" srcSet="https://static.scientificamerican.com/sciam/cache/file/FFE0FDE8-0279-478C-AE4818F629E35547_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/FFE0FDE8-0279-478C-AE4818F629E35547_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="1894-02-24">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/02-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/2AB7F349-B846-4403-90C7C738E694334C_source.gif?w=600" alt="SA Supplements Vol 37 Issue 946supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/2AB7F349-B846-4403-90C7C738E694334C_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/2AB7F349-B846-4403-90C7C738E694334C_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="1894-02-17">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/02-17/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/AD0464C5-659E-42A2-BD9D6559FDFFB43C_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 7" srcSet="https://static.scientificamerican.com/sciam/cache/file/AD0464C5-659E-42A2-BD9D6559FDFFB43C_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/AD0464C5-659E-42A2-BD9D6559FDFFB43C_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="1894-02-17">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/02-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/A11430D0-B936-49E6-982B6DE5F178AFBF_source.gif?w=600" alt="SA Supplements Vol 37 Issue 945supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/A11430D0-B936-49E6-982B6DE5F178AFBF_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/A11430D0-B936-49E6-982B6DE5F178AFBF_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="1894-02-10">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/sa/1894/02-10/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/88C5650D-82D0-4F22-B0EB55EF3053E1A5_source.jpg?w=600" alt="Scientific American Magazine Vol 70 Issue 6" srcSet="https://static.scientificamerican.com/sciam/cache/file/88C5650D-82D0-4F22-B0EB55EF3053E1A5_source.jpg?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/88C5650D-82D0-4F22-B0EB55EF3053E1A5_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="1894-02-10">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/supplements/1894/02-03/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/C0895420-BB4D-4C4B-8360CE8388DDBD36_source.gif?w=600" alt="SA Supplements Vol 37 Issue 944supp" srcSet="https://static.scientificamerican.com/sciam/cache/file/C0895420-BB4D-4C4B-8360CE8388DDBD36_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="1894-02-03">February 1894</time></div></div></div></a></div><div class="list__item--tR3J"><a class="issue__link-3e-qg" href="/issue/builders/1894/02-01/"><div class="issue-VnvuN"><div><div><figure class="issueImageContainer-WnIB2"><img class="issue__cover__image-35p5E" src="https://static.scientificamerican.com/sciam/cache/file/6EF558D2-F6CC-499E-89596458C62D3AF8_source.gif?w=600" alt="SA Builders Vol 17 Issue 2build" srcSet="https://static.scientificamerican.com/sciam/cache/file/6EF558D2-F6CC-499E-89596458C62D3AF8_source.gif?w=300 300w, https://static.scientificamerican.com/sciam/cache/file/6EF558D2-F6CC-499E-89596458C62D3AF8_source.gif?w=600 600w" sizes="300px" width="300" loading="lazy"/></figure></div></div><div class="issue__info-Wrv5W"><h3 class="issue__title-rRMdq">Builders</h3><div 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