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<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <title>Scientific American Volume 132, Issue 3 | Scientific American</title> <link rel="canonical" href="https://www.scientificamerican.com/issue/sa/1925/03-01/"> <meta name="theme-color" content="#fff"/> <meta name="robots" content="max-image-preview:standard"/> <link rel="image_src" src="https://static.scientificamerican.com/sciam/cache/file/EE51DB6B-4CBE-4445-AAB083E30ED48DC8_source.jpg"> <meta property="og:url" content="https://www.scientificamerican.com/issue/sa/1925/03-01/"/> <meta property="og:image" content="https://static.scientificamerican.com/sciam/cache/file/EE51DB6B-4CBE-4445-AAB083E30ED48DC8_source.jpg?w=1200"/> <meta name="twitter:image" content="https://static.scientificamerican.com/sciam/cache/file/EE51DB6B-4CBE-4445-AAB083E30ED48DC8_source.jpg?w=1200"/> <meta name="description" content=""What Minute Will You Die?", "The Auto's Toll of Lives", ""The Best Observed Eclipse in History"" and more"/> <meta property="og:description" content=""What Minute Will You Die?", "The Auto's Toll of Lives", ""The Best Observed Eclipse in History"" and more"/> <meta property="og:type" content="website"/> <meta name="twitter:title" content="Scientific American Volume 132, Issue 3"/> <meta name="twitter:description" content=""What Minute Will You Die?", "The Auto's Toll of Lives", ""The Best Observed Eclipse in History"" and more"/> <meta property="og:site_name" content="Scientific American"/> <meta property="og:locale" content="en_US"/> <meta name="twitter:site" content="@sciam"/> <meta name="twitter:domain" content="scientificamerican.com"/> <meta name="twitter:card" content="summary_large_image"/> <script type="application/ld+json">{"@context":"https://schema.org","@graph":[{"@type":"PublicationIssue","@id":"https://www.scientificamerican.com/issue/sa/1925/03-01/","datePublished":"1925-03-01","description":"Scientific American Volume 132, Issue 3","hasPart":[{"@type":"Article","about":"","author":[],"datePublished":"1925-03-01T00:00:00-05:00","headline":"Our Point of View, March 1925","image":null},{"@type":"Article","about":"A Department Devoted to Pioneer Work in the Various Arts and to Patent News","author":[{"@type":"Person","name":"Albert A. 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https://static.scientificamerican.com/sciam/cache/file/EE51DB6B-4CBE-4445-AAB083E30ED48DC8_source.jpg?w=600 600w, https://static.scientificamerican.com/sciam/cache/file/EE51DB6B-4CBE-4445-AAB083E30ED48DC8_source.jpg?w=900 900w" sizes="300px" width="300"/></div><div class="issue__detail__info-PytSq"><div class="issue__detail__meta-cIUoE"><h1>Scientific American Magazine</h1></div><div class="issue__heading-gBfnb"><h2><time dateTime="1925-03-01">March 1925</time></h2></div><small><span>Volume 132</span>, <span>Issue 3</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">What Minute Will You Die?</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">Mary McFadden</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Auto's Toll of Lives</h4><section><div class="dek-5E7-A"><p>How Can We Revise Our Traffic Laws to Make the Highways Safer?</p></div><p class="authors-G71Hd">H. W. Slauson</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">"The Best Observed Eclipse in History"</h4><section><div class="dek-5E7-A"><p>A Preliminary Report of What Was Learned on January Twenty-fourth, Including the Results of the Scientific American's Observing Party</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Our Artificial Gold Investigation</h4><section><div class="dek-5E7-A"><p>Photographs of Our Famous Experiments on Cracking the Atom</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">New Knowledge of Old Egypt</h4><section><div class="dek-5E7-A"><p>American Expeditions Are Adding to Our Information About Centuries of the Past Photographs by courtesy of the Metropolitan Museum of Art</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Hunting Spiders</h4><section><div class="dek-5E7-A"><p>Predaceous Habits of These Insects Make Them Useful to Man</p></div><p class="authors-G71Hd">S. F. Aaron</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Age of Fire is Passing</h4><section><div class="dek-5E7-A"><p>Important New Developments of Electric Heating that Promise Much for Industry</p></div><p class="authors-G71Hd">Calvert Townley</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Model Maker Suggests Way to Help New York Traffic</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">Widening the Limits of the Universe</h4><section><div class="dek-5E7-A"><p>Two Spiral Nebulae Discovered to Be One Million Light-Years Away</p></div><p class="authors-G71Hd">Henry Norris Russell</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Future Leviathans of the Skies</h4><section><div class="dek-5E7-A"><p>The Last of Three Articles on Dirigible Airships</p></div><p class="authors-G71Hd">Alexander Klemin</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">What Becomes of the Energy Contained in a Ton of Coal</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">Heavens Built of Concrete</h4><section><div class="dek-5E7-A"><p>Ingenious Optical Devices Installed in Concrete Dome Are Used to Show the Motions of the Stars</p></div><p class="authors-G71Hd">G. H. Morison</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Our Radio Page</h4><section><div class="dek-5E7-A"><p>Listening-In on the Latest Progress of the Broadcasting Art</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Streamline Bodies Save Power</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">J. H. W. Kerston</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Steel to Replace Stone</h4><section><div class="dek-5E7-A"><p>High Bridge with Its Historical Background and Architectural Beauty to Be Retained</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Which Radio Set to Buy</h4><section><div class="dek-5E7-A"><p>The Third Month of Our New Service to Radio Purchasers</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">A Cross-Word Puzzle</h4><section><div class="dek-5E7-A"><p>Test Your Knowledge of Scientific Terms. Earn a Credit Toward a New Subscription</p></div><p class="authors-G71Hd">Jack Barrett</p></section></article></div><div class="issueArchiveArticleList-p9KXT"><h2 class="listHeading-TIGph">Departments</h2><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Our Point of View, March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Inventions New and Interesting, March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Recently Patented Inventions, March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">The Scientific American Digest, March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">The Heavens in March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Learning to Use Our Wings, March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Radio Notes, March 1925</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Notes and Queries, March 1925</h2></article></div></div></div></div></div></div></main><footer class="footer-VfsmT"><div class="footerContainer-pfbjC"><h2 class="footerMainText-wQ3og">Expand Your World with Science</h2></div><div class="footerFlexContainer-XKe5g footerContainer-pfbjC"><div class="footerLinks-m1THn"><p class="footerText-PzHcy">Learn and share the most exciting discoveries, innovations and ideas shaping our world today.</p><a class="footerLink-uRzI4" href="https://www.scientificamerican.com/getsciam/">Subscribe</a><a class="footerLink-uRzI4" href="https://www.scientificamerican.com/newsletter-signup/">Sign up for our newsletters</a><a class="footerLink-uRzI4" href="https://www.scientificamerican.com/">See the latest stories</a><a class="footerLink-uRzI4" href="https://www.scientificamerican.com/latest-issue/">Read the latest 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