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srcSet="https://static.scientificamerican.com/sciam/cache/file/77279225-7FFB-475A-A3CB6C750AE18AB7_source.gif?w=400 400w, https://static.scientificamerican.com/sciam/cache/file/77279225-7FFB-475A-A3CB6C750AE18AB7_source.gif?w=600 600w, https://static.scientificamerican.com/sciam/cache/file/77279225-7FFB-475A-A3CB6C750AE18AB7_source.gif?w=900 900w" sizes="300px" width="300"/></div><div class="issue__detail__info-PytSq"><div class="issue__detail__meta-cIUoE"><h1>SA Supplements</h1></div><div class="issue__heading-gBfnb"><h2><time dateTime="1907-09-07">September 1907</time></h2></div><small><span>Volume 64</span>, <span>Issue 1653supp</span></small><div class="download__access-pNuvp"><p>You are currently logged out. Please sign in to download the issue PDF.</p><button class="button-Nws5y button__primary-WTBGh">Sign In</button></div><div class="issueArchiveArticleList-p9KXT"><div class="issueArchiveArticleList-p9KXT"><h2 class="listHeading-TIGph">Features</h2><article class="article-4xs14"><h4 class="articleTitle-e093r">The Okapi and its Native Wilds</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">Harry Johnston</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Progress of Zoology</h4><section><div class="dek-5E7-A"><p>American Pioneers in Deep Sea Exploration</p></div><p class="authors-G71Hd">Alexander Agassiz</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Labor's Share</h4><section><div class="dek-5E7-A"><p>Three Times Capital's Reward in Productive Industry</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Deep Wells that Feel the Sea</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Electrolytic Theory of the Corrosion of Iron.鈥擨I</h4><section><div class="dek-5E7-A"><p>The Real Cause of Iron Rust</p></div><p class="authors-G71Hd">Allerton S. Cushman</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">A Novel System of Wireless Telephony</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Distant Operation by Hertzian Waves</h4><section><div class="dek-5E7-A"><p>Garet's Apparatus</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Development of Armored War Vessels.鈥擨I</h4><section><div class="dek-5E7-A"><p>Armor Plating in the United States</p></div><p class="authors-G71Hd">J. H. Morrison</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Rise of Man</h4><section><div class="dek-5E7-A"><p>A Study in Evolution</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Tomatoes that Imitate Fruit</h4><section><div class="dek-5E7-A"><p>The Eccentricities of a Common Vegetable</p></div><p class="authors-G71Hd">I. M. Angell</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Share which Manufactures Form of the Exports to the Various Sections of the World</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Photographic Plate Testing</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Mosquito Extermination Work</h4><section><div class="dek-5E7-A"><p>An Account of Work in Massachusetts</p></div><p class="authors-G71Hd">Henry Clay Weeks</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Karawanken Tunnel</h4><section><div class="dek-5E7-A"><p>The Construction of a Great Engineering Work</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Modern Locomotive</h4><section><div class="dek-5E7-A"><p>The Types which have been Evolved</p></div><p class="authors-G71Hd">Paul T. Warner</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Glacial Studies in the Sierra Nevada</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Correspondence</h4><section><div class="dek-5E7-A"><p>The Periyar Irrigation Project</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Census of Metal-Working Machinery</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Electrical Notes</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Engineering Notes</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd"></p></section></article><article 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