CINXE.COM

<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <title>Scientific American Volume 91, Issue 16 | Scientific American</title> <link rel="canonical" href="https://www.scientificamerican.com/issue/sa/1904/10-15/"> <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/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg"> <meta property="og:url" content="https://www.scientificamerican.com/issue/sa/1904/10-15/"/> <meta property="og:image" content="https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=1200"/> <meta name="twitter:image" content="https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=1200"/> <meta name="description" content=""Arsenic Needed for the Body and Found in Different Foods", "Experiments on the Mosquito", "Big Guns for Future Warships" and more"/> <meta property="og:description" content=""Arsenic Needed for the Body and Found in Different Foods", "Experiments on the Mosquito", "Big Guns for Future Warships" and more"/> <meta property="og:type" content="website"/> <meta name="twitter:title" content="Scientific American Volume 91, Issue 16"/> <meta name="twitter:description" content=""Arsenic Needed for the Body and Found in Different Foods", "Experiments on the Mosquito", "Big Guns for Future Warships" 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/1904/10-15/","datePublished":"1904-10-15","description":"Scientific American Volume 91, Issue 16","hasPart":[{"@type":"Article","about":"\"Cyclone\" or \"Tornado\"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Correspondence - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Recently Patented Inventions - October 15, 1904","image":null},{"@type":"Article","about":"Hints to Correspondents","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Notes and Queries - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"New Books, Etc. - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Index of Inventions - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Patents - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Arsenic Needed for the Body and Found in Different Foods","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"T. H. Evans","url":"www.scientificamerican.com/author/t-h-evans/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Experiments on the Mosquito","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Big Guns for Future Warships","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Elevator Fatalities and Their Prevention","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Municipal Bakery Experiments in Sicily","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Automobile Notes","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"George E. Walsh","url":"www.scientificamerican.com/author/george-e-walsh/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Automobile Steel Specialties","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"The Diving Horse","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"The Taxometer","image":null},{"@type":"Article","about":"By Our Berlin Correspondent","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Transportable Wireless Telegraph Station for War Purposes","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"S. Frank Aaion","url":"www.scientificamerican.com/author/s-frank-aaion/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Insect Wings","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Dastardly Attempt to Wreck the \"Connecticut\"","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"The \"Cire-Perdue\" Process of Bronze Casting","image":null},{"@type":"Article","about":"By the Special Correspondent of the Scientific American","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Exhibits in the Boiler House and the Palace of Machinery, St. Louis","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"Charles B. Hayward","url":"www.scientificamerican.com/author/charles-b-hayward/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"A Novel Suspension Bridge","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Device for Muffling the Exhaust from Engines","image":null},{"@type":"Article","about":"Convertible Wrench and Vise","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Patent Department","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"A Portable Pneumatic Duster","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Oddities in Invention","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Fruit and Potato Sorter","image":null},{"@type":"Article","about":"HEAD THIS COLUMN CAREFULLY.-You will tind inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will Fend you the name and address of the party desiring the information. In every ease it is necessary to give the number of the inquiry","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Business and Personal Wants","image":null}],"image":"https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg","isPartOf":{"@type":["Periodical","PublicationVolume"],"@id:":"vol91","name":"Scientific American Magazine","publisher":"Scientific American"},"issueNumber":"16","url":"https://www.scientificamerican.com/issue/sa/1904/10-15/"}]}</script> <script type="application/ld+json">{"@context":"https://schema.org","@type":"NewsMediaOrganization","@id":"https://www.scientificamerican.com/#publisher","name":"Scientific American","alternateName":"SciAm","legalName":"Scientific American, a Division of Springer Nature America, Inc.","description":"Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.","foundingDate":"1845-08-28","logo":{"@type":"ImageObject","url":"https://www.scientificamerican.com/static/sciam.svg"},"url":"https://www.scientificamerican.com/","masthead":"https://www.scientificamerican.com/masthead/","sameAs":["https://en.wikipedia.org/wiki/Scientific_American","https://www.wikidata.org/wiki/Q39379","https://www.jstor.org/publisher/sciamerican","https://x.com/sciam","https://www.youtube.com/user/SciAmerican","https://www.tiktok.com/@scientificamerican","https://www.threads.net/@scientific_american","https://www.facebook.com/ScientificAmerican/"],"address":{"@type":"PostalAddress","streetAddress":"1 New York Plaza","addressLocality":"New York","addressRegion":"NY","postalCode":"10004","addressCountry":"US"}}</script> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <link rel="icon shortcut" href="/static/favicon.ico" /> <link rel="alternate" type="application/rss+xml" title="RSS" href="https://www.scientificamerican.com/platform/syndication/rss/" /> <script data-layer="critical">;performance.mark('app-load-start');((d,ael,dcl,unl,cxl,log,onunl)=>{log('[readyState]',d.readyState);d[ael]('readystatechange',()=>log('[readyState]',d.readyState));d[ael](dcl,()=>log(dcl));d[ael](unl,onunl);window.onload=()=>{d.removeEventListener(unl,onunl);log('windowloaded')};})(document,'addEventListener','DOMContentLoaded','beforeunload','cancelled',(...msg)=>console.log('[dev]',...msg),()=>{window[cxl]=true;log(cxl)});((l,pii) => {if (pii.some(p => l.search.includes(p+"="))) {window.initSearch = l.search;const anon = new URLSearchParams(l.search);pii.forEach(p => anon.delete(p));history.replaceState({}, "", l.pathname + "?" + anon);} })(location, ["email", "magic_link", "token", "code", "state"]);</script> <script type="module" crossorigin src="/static/bundle.0ab5d89c.js"></script> <link rel="modulepreload" crossorigin href="/static/chunks/preload-helper-4aa0ec7d.js"> <link rel="modulepreload" crossorigin href="/static/chunks/vendor-react-f9bf3b4a.js"> <link rel="modulepreload" crossorigin href="/static/chunks/sciam-e08a1478.js"> <link rel="modulepreload" crossorigin href="/static/chunks/use-environment-a37698d5.js"> <link rel="modulepreload" crossorigin href="/static/chunks/datalayer-d861d60c.js"> <link rel="modulepreload" crossorigin href="/static/chunks/use-piano-auth-sync-dafe0458.js"> <link rel="modulepreload" crossorigin href="/static/chunks/useOverlay-fe78e6e1.js"> <link rel="stylesheet" href="/static/assets/bundle-49553f4a.css"> <link rel="stylesheet" href="/static/assets/Kicker-9f542fcf.css"> <link rel="stylesheet" href="/static/assets/index-1a691954.css"> <link rel="stylesheet" href="/static/assets/ArticleDisplay-1b56bae7.css"> <link rel="stylesheet" href="/static/assets/IssuePage-398d1558.css"> <link rel="stylesheet" href="/static/assets/DefaultLayout-2955ad5f.css"> <link rel="modulepreload" href="/static/issue.13ef0ddb.js" crossorigin fetchpriority="auto"> <link rel="preload" href="https://cdn.cookielaw.org/scripttemplates/otSDKStub.js" as="script" fetchpriority="auto"> <link rel="preload" href="https://www.googletagmanager.com/gtm.js?id=GTM-5FLM662" as="script" fetchpriority="auto"> <link rel="preload" href="https://www.scientificamerican.com/sciads/sciads.js" as="script" fetchpriority="auto"> <link rel="preload" href="https://cdn.tp.scientificamerican.com/api/tinypass.min.js" as="script" fetchpriority="low"> <link rel="preconnect" href="https://cdn.cxense.com/cx.cce.js" as="script"> </head> <body> <div id="app"><header class="headerContainer-8KxQ5" role="banner"><a href="#main" id="skipToMain" class="skiptocontent sr-only-focusable sr-only">Skip to main content</a><div class="header-1t1JE flex-aYeiI"><div class="left-ajw3c flex-aYeiI"><a href="/" aria-label="Link to homepage" class="logoLink-Wt3sq"><span class="sr-only">Scientific American</span><svg width="1em" height="1em" viewBox="0 0 120.79 128.39" fill="currentColor" role="img" aria-label="Scientific American"><path d="M7.98 58.19c2.3 0 5.24 3.18 14.53 3.18 13.66 0 21.75-8.57 21.75-17.86 0-7.86-3.73-12.94-11.43-17.23l-9.37-5.24c-4.05-2.3-7.46-5.32-7.46-9.92 0-4.92 3.73-7.7 9.69-7.7s11.35 4.21 13.02 13.26h1.98V.95h-1.83c-.16 1.43-.87 2.06-1.75 2.06-2.06 0-4.53-2.94-12.62-2.94C13.85.08 5.12 6.51 5.12 16.35c0 7.3 3.26 11.83 9.77 15.56l9.61 5.48c5.48 3.18 7.7 6.19 7.7 10.72 0 5.64-3.18 9.77-10.64 9.77-9.29 0-13.58-5.08-15.32-16.2H4.1V60.5h1.98c.16-1.67.95-2.3 1.91-2.3Zm65.97 3.26c11.11-.03 19.13-8.81 20.4-20.72l-2.22-.64c-2.54 8.26-7.22 12.46-13.97 12.46-12.23 0-16.04-14.93-16.04-27.87 0-15.56 6.11-21.28 14.13-21.28 5.72 0 11.83 5.72 14.45 16.59h2.06V.95h-1.91c-.16 1.27-.87 2.06-2.14 2.06-1.91 0-5.72-3.02-11.83-3.02-14.85 0-28.66 12.07-28.66 32.39 0 17.39 10.96 29.1 25.72 29.06Zm14.53 42.72L76.49 68.84H56.24v1.75c3.33.16 4.76.95 4.76 5.95v42c0 6.03-1.67 8.1-5.32 8.1-2.54 0-4.53-1.91-6.51-6.91L29.11 68.12h-2.7L6.35 119.89c-2.17 5.72-4.3 6.75-6.35 6.75v1.75h18.02v-1.75c-5.8-.24-8.65-2.7-5.8-10.48l2.05-5.4h17.88l3.45 8.97c2.3 5.72.64 6.91-3.73 6.91v1.75h39.62v-1.75c-4.13 0-6.27-1.19-6.27-8.02l.48-42.08 17.07 51.29h2.14l17.63-51.05v43.9c0 5.48-1.75 5.95-5.08 5.95v1.75h23.34v-1.75c-3.33 0-4.76-.48-4.76-5.95V76.54c0-5.56 1.43-5.95 4.76-5.95v-1.75h-19.85l-12.46 35.33Zm-72.88 3.1 7.56-19.85 7.63 19.85H15.6ZM120.79 2.7V.95h-23.1V2.7c3.33 0 4.84.32 4.84 5.95v44.14c0 5.48-1.51 5.95-4.84 5.95v1.75h23.1v-1.75c-3.33 0-4.76-.48-4.76-5.95V8.65c0-5.64 1.43-5.95 4.76-5.95Z"></path></svg></a></div><div class="center-oMgM8 flex-aYeiI"></div><div class="right-4LP3J flex-aYeiI"><button type="button" id="radix-:R5t:" aria-haspopup="menu" aria-expanded="false" data-state="closed" class="trigger-8ea-U" aria-label="User Menu"><div class="dropdownIconContainer-hDbEe"><svg width="1em" height="1em" viewBox="0 0 472 472" fill="currentColor" role="img" aria-label="User" class="dropdownIcon-XeKnP profileIconImg-pc8tD"><path d="M403 69a235 235 0 0 0-334 0 235 235 0 0 0 0 334 235 235 0 0 0 334 0 235 235 0 0 0 0-334ZM118 412a122 122 0 0 1 237 0 211 211 0 0 1-237 0Zm41-197a77 77 0 1 1 155 0 77 77 0 0 1-155 0Zm216 181c-14-43-48-77-91-92a101 101 0 1 0-96 0c-43 15-77 49-91 92a212 212 0 1 1 278 0Z"></path></svg><div class="dropdownIcon-XeKnP initials-z1adZ"></div></div></button></div></div></header><main class="main-gNG8x"><div><div class="issue__meta-K-64E"><a href="/issues/"><聽 Back to Archive</a></div><div class="archive__issue-dDltj"><div class="issue__detail-mYb0u"><div class="issue__detail__cover-8w-5D"><img src="https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=300" alt="Scientific American Magazine Vol 91 Issue 16" srcSet="https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=400 400w, https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=600 600w, https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_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="1904-10-15">October 1904</time></h2></div><small><span>Volume 91</span>, <span>Issue 16</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">Arsenic Needed for the Body and Found in Different Foods</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">Experiments on the Mosquito</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">T. H. Evans</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Big Guns for Future Warships</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">Elevator Fatalities and Their Prevention</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">Municipal Bakery Experiments in Sicily</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">Automobile 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">Automobile Steel Specialties</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">George E. Walsh</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">The Diving Horse</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 Taxometer</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">Transportable Wireless Telegraph Station for War Purposes</h4><section><div class="dek-5E7-A"><p>By Our Berlin Correspondent</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Insect Wings</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">S. Frank Aaion</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Dastardly Attempt to Wreck the "Connecticut"</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 "Cire-Perdue" Process of Bronze Casting</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">Exhibits in the Boiler House and the Palace of Machinery, St. Louis</h4><section><div class="dek-5E7-A"><p>By the Special Correspondent of the <i>Scientific American</i></p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">A Novel Suspension Bridge</h4><section><div class="dek-5E7-A"><p></p></div><p class="authors-G71Hd">Charles B. Hayward</p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">Device for Muffling the Exhaust from Engines</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">Patent Department</h4><section><div class="dek-5E7-A"><p>Convertible Wrench and Vise</p></div><p class="authors-G71Hd"></p></section></article><article class="article-4xs14"><h4 class="articleTitle-e093r">A Portable Pneumatic Duster</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">Oddities in Invention</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">Fruit and Potato Sorter</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">Business and Personal Wants</h4><section><div class="dek-5E7-A"><p>HEAD THIS COLUMN CAREFULLY.-You will tind inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will Fend you the name and address of the party desiring the information. In every ease it is necessary to give the number of the inquiry</p></div><p class="authors-G71Hd"></p></section></article></div><div class="issueArchiveArticleList-p9KXT"><h2 class="listHeading-TIGph">Departments</h2><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Correspondence - October 15, 1904</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Recently Patented Inventions - October 15, 1904</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Notes and Queries - October 15, 1904</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">New Books, Etc. - October 15, 1904</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Index of Inventions - October 15, 1904</h2></article><article class="article-4xs14"><h2 class="departmentsArticleTitle-4XlrA">Patents - October 15, 1904</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 issue</a><a class="footerLink-uRzI4" href="https://www.scientificamerican.com/getsciam/gift/">Give a Gift Subscription</a><p class="footerSocialMedia-7KIIV">Follow Us:<a href="https://www.instagram.com/scientific_american/?hl=en" target="_blank" alt="Instagram link" title="Instagram"><svg class="footerSocialIcon-UQyIx" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M224.1 141c-63.6 0-114.9 51.3-114.9 114.9s51.3 114.9 114.9 114.9S339 319.5 339 255.9 287.7 141 224.1 141zm0 189.6c-41.1 0-74.7-33.5-74.7-74.7s33.5-74.7 74.7-74.7 74.7 33.5 74.7 74.7-33.6 74.7-74.7 74.7zm146.4-194.3c0 14.9-12 26.8-26.8 26.8-14.9 0-26.8-12-26.8-26.8s12-26.8 26.8-26.8 26.8 12 26.8 26.8zm76.1 27.2c-1.7-35.9-9.9-67.7-36.2-93.9-26.2-26.2-58-34.4-93.9-36.2-37-2.1-147.9-2.1-184.9 0-35.8 1.7-67.6 9.9-93.9 36.1s-34.4 58-36.2 93.9c-2.1 37-2.1 147.9 0 184.9 1.7 35.9 9.9 67.7 36.2 93.9s58 34.4 93.9 36.2c37 2.1 147.9 2.1 184.9 0 35.9-1.7 67.7-9.9 93.9-36.2 26.2-26.2 34.4-58 36.2-93.9 2.1-37 2.1-147.8 0-184.8zM398.8 388c-7.8 19.6-22.9 34.7-42.6 42.6-29.5 11.7-99.5 9-132.1 9s-102.7 2.6-132.1-9c-19.6-7.8-34.7-22.9-42.6-42.6-11.7-29.5-9-99.5-9-132.1s-2.6-102.7 9-132.1c7.8-19.6 22.9-34.7 42.6-42.6 29.5-11.7 99.5-9 132.1-9s102.7-2.6 132.1 9c19.6 7.8 34.7 22.9 42.6 42.6 11.7 29.5 9 99.5 9 132.1s2.7 102.7-9 132.1z"></path></svg></a><a href="https://www.youtube.com/user/SciAmerican" target="_blank" alt="YouTube link" title="YouTube"><svg class="footerSocialIcon-UQyIx" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 576 512"><path d="M549.655 124.083c-6.281-23.65-24.787-42.276-48.284-48.597C458.781 64 288 64 288 64S117.22 64 74.629 75.486c-23.497 6.322-42.003 24.947-48.284 48.597-11.412 42.867-11.412 132.305-11.412 132.305s0 89.438 11.412 132.305c6.281 23.65 24.787 41.5 48.284 47.821C117.22 448 288 448 288 448s170.78 0 213.371-11.486c23.497-6.321 42.003-24.171 48.284-47.821 11.412-42.867 11.412-132.305 11.412-132.305s0-89.438-11.412-132.305zm-317.51 213.508V175.185l142.739 81.205-142.739 81.201z"></path></svg></a><a href="https://www.threads.net/@scientific_american" target="_blank" alt="Threads link" title="Threads"><svg class="footerSocialIcon-UQyIx" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M331.5 235.7c2.2.9 4.2 1.9 6.3 2.8c29.2 14.1 50.6 35.2 61.8 61.4c15.7 36.5 17.2 95.8-30.3 143.2c-36.2 36.2-80.3 52.5-142.6 53h-.3c-70.2-.5-124.1-24.1-160.4-70.2c-32.3-41-48.9-98.1-49.5-169.6v-.5c.5-71.5 17.1-128.6 49.4-169.6c36.3-46.1 90.3-69.7 160.5-70.2h.3c70.3.5 124.9 24 162.3 69.9c18.4 22.7 32 50 40.6 81.7l-40.4 10.8c-7.1-25.8-17.8-47.8-32.2-65.4c-29.2-35.8-73-54.2-130.5-54.6c-57 .5-100.1 18.8-128.2 54.4C72.1 146.1 58.5 194.3 58 256c.5 61.7 14.1 109.9 40.3 143.3c28 35.6 71.2 53.9 128.2 54.4c51.4-.4 85.4-12.6 113.7-40.9c32.3-32.2 31.7-71.8 21.4-95.9c-6.1-14.2-17.1-26-31.9-34.9c-3.7 26.9-11.8 48.3-24.7 64.8c-17.1 21.8-41.4 33.6-72.7 35.3c-23.6 1.3-46.3-4.4-63.9-16c-20.8-13.8-33-34.8-34.3-59.3c-2.5-48.3 35.7-83 95.2-86.4c21.1-1.2 40.9-.3 59.2 2.8c-2.4-14.8-7.3-26.6-14.6-35.2c-10-11.7-25.6-17.7-46.2-17.8h-.7c-16.6 0-39 4.6-53.3 26.3l-34.4-23.6c19.2-29.1 50.3-45.1 87.8-45.1h.8c62.6.4 99.9 39.5 103.7 107.7l-.2.2zm-156 68.8c1.3 25.1 28.4 36.8 54.6 35.3c25.6-1.4 54.6-11.4 59.5-73.2c-13.2-2.9-27.8-4.4-43.4-4.4c-4.8 0-9.6.1-14.4.4c-42.9 2.4-57.2 23.2-56.2 41.8z"></path></svg></a><a href="https://www.facebook.com/ScientificAmerican" target="_blank" alt="Facebook link" title="Facebook"><svg class="footerSocialIcon-UQyIx" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 512"><path d="M279.14 288l14.22-92.66h-88.91v-60.13c0-25.35 12.42-50.06 52.24-50.06h40.42V6.26S260.43 0 225.36 0c-73.22 0-121.08 44.38-121.08 124.72v70.62H22.89V288h81.39v224h100.17V288z"></path></svg></a><a href="/platform/syndication/rss/" target="_blank" alt="RSS feed" title="RSS feed"><svg class="footerSocialIcon-UQyIx" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M0 64C0 46.3 14.3 32 32 32c229.8 0 416 186.2 416 416c0 17.7-14.3 32-32 32s-32-14.3-32-32C384 253.6 226.4 96 32 96C14.3 96 0 81.7 0 64zM0 416a64 64 0 1 1 128 0A64 64 0 1 1 0 416zM32 160c159.1 0 288 128.9 288 288c0 17.7-14.3 32-32 32s-32-14.3-32-32c0-123.7-100.3-224-224-224c-17.7 0-32-14.3-32-32s14.3-32 32-32z"></path></svg></a></p></div><div class="footerImageContainer-omuef"><img class="footerImage-fMFhw" src="/static/assets/footerProductImg-f6732134.png" alt="Scientific American publications in print & digital formats" as="image" loading="lazy"/></div></div><div class="grid-c0--6 footerContainer-pfbjC"><div><ul><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/return-refund-policy/">Return & Refund Policy</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/about-scientific-american/">About</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/pressroom/">Press Room</a></li></ul></div><div><ul class="footer-links"><li><a class="footerSmallLink-tZvCu" href="/page/frequently-asked-questions/subscriptions-products/">FAQs</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/contact-us/customer-service/">Contact Us</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/international/">International Editions</a></li></ul></div><div><ul class="footer-links"><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/mediakit/">Advertise</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/accessibility-statement/">Accessibility Statement</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/terms-of-use/">Terms of Use</a></li></ul></div><div><ul class="footer-links"><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/privacy-policy/">Privacy Policy</a></li><li><a class="footerSmallLink-tZvCu" href="https://www.scientificamerican.com/page/california-consumer-privacy-statement/">California Consumer Privacy Statement</a></li><li><a class="footerSmallLink-tZvCu" href="#">Use of cookies/Do not sell my data</a></li></ul></div></div><div class="footerContainer-pfbjC"><p>Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www.springernature.com/us). Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers.</p><p>漏 2024 SCIENTIFIC AMERICAN, A DIVISION OF SPRINGER NATURE AMERICA, INC.<br/>ALL RIGHTS RESERVED.</p></div></footer></div> <script id="__DATA__">window.__DATA__=JSON.parse(`{"initialData":{"issueData":{"contentful_id":"4YaraQpcU9zeQw51aIf6QU","mura_id":null,"path":"/issue/sa/1904/10-15/","magazine_title":"Scientific American Magazine","issue_title":"Scientific American Volume 91, Issue 16","volume":91,"issue":"16","issue_date":"1904-10-15","pdf_file":"https://static.scientificamerican.com/sciam/cache/file/2369F4E5-116A-4D23-8772A7922FC7489E.pdf","image_url":"https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg","image_width":440,"image_height":578,"image_alt_text":null,"image_caption":null,"image_credits":null,"cover_credits":null,"image_desktop_url":null,"image_desktop_width":0,"image_desktop_height":0,"image":null,"article_previews":{"advances":[],"departments":[{"id":1185241,"contentful_id":"5mHiNHqZezyO0wn7AHcWyA","article_doi":"10.1038/scientificamerican10151904-263","mura_id":"2F4A1301-FC55-4CAC-B2492DC9B4CF2A41","mura_contentid":"5407D00F-F388-5270-16B773D2689EA7C0","title":"Correspondence - October 15, 1904","display_title":"<p>Correspondence - October 15, 1904</p>","slug":"correspondence-1904-10-15","url":"/article/correspondence-1904-10-15/","summary":"<p>\\"Cyclone\\" or \\"Tornado\\"</p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Departments","page_number":"263"},{"id":1185261,"contentful_id":"6MRvjCYO89W0odAtR4Udsx","article_doi":"10.1038/scientificamerican10151904-270","mura_id":"2B22DB88-1EA3-4A78-B476ABC23D1F0473","mura_contentid":"54084EDC-9216-4114-4F8E6B115A7D9A01","title":"Recently Patented Inventions - October 15, 1904","display_title":"<p>Recently Patented Inventions - October 15, 1904</p>","slug":"recently-patented-inventions-1904-10-15","url":"/article/recently-patented-inventions-1904-10-15/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Departments","page_number":"270"},{"id":1185247,"contentful_id":"5Lg0bOPYajAOFkVXV0hCex","article_doi":"10.1038/scientificamerican10151904-271a","mura_id":"66EAC9C3-9825-4C00-8553598442B5318F","mura_contentid":"540959DB-B093-EC5E-E7480C7C03395359","title":"Notes and Queries - October 15, 1904","display_title":"<p>Notes and Queries - October 15, 1904</p>","slug":"notes-and-queries-1904-10-15","url":"/article/notes-and-queries-1904-10-15/","summary":"<p>Hints to Correspondents</p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Departments","page_number":"271"},{"id":1185255,"contentful_id":"yRXsjTg3rr3DjIQbUYSx8","article_doi":"10.1038/scientificamerican10151904-271b","mura_id":"513F47A4-C6DF-46D7-8A7EBE8E08251A55","mura_contentid":"540826EC-EE51-9D4B-D8868EFBCFEE46AF","title":"New Books, Etc. - October 15, 1904","display_title":"<p>New Books, Etc. - October 15, 1904</p>","slug":"new-books-etc-1904-10-15","url":"/article/new-books-etc-1904-10-15/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Departments","page_number":"271"},{"id":1185279,"contentful_id":"2K6MuYFx1miU18y7c3uaHX","article_doi":"10.1038/scientificamerican10151904-271c","mura_id":"6A884302-D2F7-4618-893CB8B6DD6E90E4","mura_contentid":"54090E57-9DAB-20E2-7DFBBA935795DD93","title":"Index of Inventions - October 15, 1904","display_title":"<p>Index of Inventions - October 15, 1904</p>","slug":"index-of-inventions-1904-10-15","url":"/article/index-of-inventions-1904-10-15/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Departments","page_number":"271"},{"id":1185269,"contentful_id":"5Y1GwSCJGhrGBRTisCnLDI","article_doi":"10.1038/scientificamerican10151904-274","mura_id":"8BC77ABC-E938-473D-8BC02B641E1F244D","mura_contentid":"5408E6E5-A430-DDDA-AF70009AE8989DE7","title":"Patents - October 15, 1904","display_title":"<p>Patents - October 15, 1904</p>","slug":"patents-october-15-1904-sa-1904-10-15","url":"/article/patents-october-15-1904-sa-1904-10-15/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Departments","page_number":"274"}],"features":[{"id":1185281,"contentful_id":"2TKPpG7MzzOoWQ969Ir3Ur","article_doi":"10.1038/scientificamerican10151904-258c","mura_id":"92DF4C8E-7B3A-476B-B35D7407084FABA0","mura_contentid":"54094A7F-E33A-FD61-C6567EB5F5606562","title":"Arsenic Needed for the Body and Found in Different Foods","display_title":"<p>Arsenic Needed for the Body and Found in Different Foods</p>","slug":"arsenic-needed-for-the-body-and-fou","url":"/article/arsenic-needed-for-the-body-and-fou/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Health","subtype":"news","column":"Features","page_number":"258"},{"id":1185248,"contentful_id":"6aHUQqn0CdlWE9qEMHmXyl","article_doi":"10.1038/scientificamerican10151904-258b","mura_id":"92143FB8-910C-4D91-978589CD1C0F165C","mura_contentid":"54096E80-F9B7-CAEE-257D8E5067418695","title":"Experiments on the Mosquito","display_title":"<p>Experiments on the Mosquito</p>","slug":"experiments-on-the-mosquito","url":"/article/experiments-on-the-mosquito/","summary":"<p></p>","authors":[{"mura_id":"1B02BB51-305A-4505-815590AC14FE7272","url":"/author/t-h-evans/","contentful_id":"6YqdCRodLr5TK5yO4i0Krp","name":"T. H. Evans","slug":"t-h-evans","biography":null,"picture_file":null,"contacts":[]}],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Health","subtype":"news","column":"Features","page_number":"258"},{"id":1185257,"contentful_id":"2n3HUQuUT0BWb2ZJ5Q9Njf","article_doi":"10.1038/scientificamerican10151904-258a","mura_id":"A58BB53C-A77A-4722-A0B98B4F74CF6746","mura_contentid":"5408C609-C8DB-ABFF-4CD94B48487744D3","title":"Big Guns for Future Warships","display_title":"<p>Big Guns for Future Warships</p>","slug":"big-guns-for-future-warships","url":"/article/big-guns-for-future-warships/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"258"},{"id":1185263,"contentful_id":"24iQEvz3Fso5OEnPbWSFX1","article_doi":"10.1038/scientificamerican10151904-258","mura_id":"DE030A2A-E33F-4F4C-B6D0D99505A1D069","mura_contentid":"54081449-B9F6-3321-9E2C49009E9F6CBC","title":"Elevator Fatalities and Their Prevention","display_title":"<p>Elevator Fatalities and Their Prevention</p>","slug":"elevator-fatalities-and-their-preve","url":"/article/elevator-fatalities-and-their-preve/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"258"},{"id":1185262,"contentful_id":"1dm6MrUHERP93v1LbPQxda","article_doi":"10.1038/scientificamerican10151904-259a","mura_id":"39A7F85B-1D0D-4C60-BEAB1CBC43C019F9","mura_contentid":"54087127-F3E7-5CFC-CEE8C3F7F915D10E","title":"Municipal Bakery Experiments in Sicily","display_title":"<p>Municipal Bakery Experiments in Sicily</p>","slug":"municipal-bakery-experiments-in-sic","url":"/article/municipal-bakery-experiments-in-sic/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"259"},{"id":1185272,"contentful_id":"2ncjcRacVJg36MpD9rDwfz","article_doi":"10.1038/scientificamerican10151904-259b","mura_id":"D80B150F-7C21-4BB5-8A60208AA15EC9A1","mura_contentid":"5408D6FB-BCB0-4B73-CEAFE81CE9B12851","title":"Automobile Notes","display_title":"<p>Automobile Notes</p>","slug":"automobile-notes-1904-10","url":"/article/automobile-notes-1904-10/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"259"},{"id":1185264,"contentful_id":"2XULrURyBUrE17DfexSmnW","article_doi":"10.1038/scientificamerican10151904-259","mura_id":"B2A93BC1-8EA2-42C8-B06E524E436ED03C","mura_contentid":"5407E11D-9CE5-E18A-45D3A9438E550FF1","title":"Automobile Steel Specialties","display_title":"<p>Automobile Steel Specialties</p>","slug":"automobile-steel-specialties","url":"/article/automobile-steel-specialties/","summary":"<p></p>","authors":[{"mura_id":"F843869A-8AC5-43C6-B85814466176027E","url":"/author/george-e-walsh/","contentful_id":"339W49OaT1kgosDjvo54f5","name":"George E. Walsh","slug":"george-e-walsh","biography":null,"picture_file":null,"contacts":[]}],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Space & Physics","subtype":"news","column":"Features","page_number":"259"},{"id":1185246,"contentful_id":"1p6tfedFPRVM2dyhpwJwLZ","article_doi":"10.1038/scientificamerican10151904-260a","mura_id":"1D7C7965-83E6-47B0-91BD5CF09CF6A3A4","mura_contentid":"540802DF-E987-850B-1A34C637658996EF","title":"The Diving Horse","display_title":"<p>The Diving Horse</p>","slug":"the-diving-horse","url":"/article/the-diving-horse/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"260"},{"id":1185238,"contentful_id":"7FArZgdql3SGWjjwcDOxlf","article_doi":"10.1038/scientificamerican10151904-260","mura_id":"B1877E23-46E4-4309-9D3FD260F6652F89","mura_contentid":"54083E27-ACC7-3BD3-A69D93268374A0D7","title":"The Taxometer","display_title":"<p>The Taxometer</p>","slug":"the-taxometer","url":"/article/the-taxometer/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"260"},{"id":1185277,"contentful_id":"5e94z6vlYrhGnoBijCzjYV","article_doi":"10.1038/scientificamerican10151904-260b","mura_id":"F82E5CDF-2DCF-42A5-AF929B2F0C8830B1","mura_contentid":"5407A919-AFA1-D061-9EE76C27CB89613B","title":"Transportable Wireless Telegraph Station for War Purposes","display_title":"<p>Transportable Wireless Telegraph Station for War Purposes</p>","slug":"transportable-wireless-telegraph-st","url":"/article/transportable-wireless-telegraph-st/","summary":"<p>By Our Berlin Correspondent</p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"260"},{"id":1185270,"contentful_id":"7rcGAoRTY4aOZRU31gVLZ2","article_doi":"10.1038/scientificamerican10151904-261","mura_id":"AF803489-9DD1-4910-87B9A856D10E4E4B","mura_contentid":"5408B465-F4AD-3D83-4DAE881C893416FF","title":"Insect Wings","display_title":"<p>Insect Wings</p>","slug":"insect-wings","url":"/article/insect-wings/","summary":"<p></p>","authors":[{"mura_id":"7CD365DF-C193-4263-B44A4ABA26C9D8B2","url":"/author/s-frank-aaion/","contentful_id":"7a7yeFm8EAU04YuXxVTWLo","name":"S. Frank Aaion","slug":"s-frank-aaion","biography":null,"picture_file":null,"contacts":[]}],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"261"},{"id":1185280,"contentful_id":"61vIoGl6EEdLBjPn2k0iOD","article_doi":"10.1038/scientificamerican10151904-262","mura_id":"BEB955DD-A6A2-4FE3-8D7481904F22066E","mura_contentid":"5407F296-EF29-DD73-272B080697C17722","title":"Dastardly Attempt to Wreck the \\"Connecticut\\"","display_title":"<p>Dastardly Attempt to Wreck the \\"Connecticut\\"</p>","slug":"dastardly-attempt-to-wreck-the-conn","url":"/article/dastardly-attempt-to-wreck-the-conn/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"262"},{"id":1185254,"contentful_id":"3uvtKakFQFkOB0aqVVYxqP","article_doi":"10.1038/scientificamerican10151904-264","mura_id":"E6B2B671-A5B0-43EE-994079C1FC66E82D","mura_contentid":"5408FB62-E57F-6BE3-BFAC68ED58173691","title":"The \\"Cire-Perdue\\" Process of Bronze Casting","display_title":"<p>The \\"Cire-Perdue\\" Process of Bronze Casting</p>","slug":"the-cire-perdue-process-of-bronze-c","url":"/article/the-cire-perdue-process-of-bronze-c/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"264"},{"id":1185256,"contentful_id":"13gOzeU1TFHLL0eozswhUt","article_doi":"10.1038/scientificamerican10151904-265a","mura_id":"86C2746B-523F-4921-929104B766931E1D","mura_contentid":"540892AD-FBA3-6E72-F0E9936462C87B99","title":"Exhibits in the Boiler House and the Palace of Machinery, St. Louis","display_title":"<p>Exhibits in the Boiler House and the Palace of Machinery, St. Louis</p>","slug":"exhibits-in-the-boiler-house-and-th","url":"/article/exhibits-in-the-boiler-house-and-th/","summary":"<p>By the Special Correspondent of the <i>Scientific American</i></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"265"},{"id":1185250,"contentful_id":"5Js11mzeW780YtvXfzUD4t","article_doi":"10.1038/scientificamerican10151904-265","mura_id":"C0D6AF10-F9AF-4ACB-93FBC57FEFF63868","mura_contentid":"54085EEA-9659-165A-113A615435E2E03A","title":"A Novel Suspension Bridge","display_title":"<p>A Novel Suspension Bridge</p>","slug":"a-novel-suspension-bridge","url":"/article/a-novel-suspension-bridge/","summary":"<p></p>","authors":[{"mura_id":"E18EFE62-76A4-4915-819FA4A16B6171B3","url":"/author/charles-b-hayward/","contentful_id":"4uVlugZMs1h9MUfH4FfEKK","name":"Charles B. Hayward","slug":"charles-b-hayward","biography":null,"picture_file":null,"contacts":[]}],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"265"},{"id":1185271,"contentful_id":"3XhvrEB5oYF0QOqcDFp7Hx","article_doi":"10.1038/scientificamerican10151904-268c","mura_id":"741AC1CF-CD3A-46D1-A5B9863367B53B58","mura_contentid":"5408822B-F737-C054-8F5E347AE48001B3","title":"Device for Muffling the Exhaust from Engines","display_title":"<p>Device for Muffling the Exhaust from Engines</p>","slug":"device-for-muffling-the-exhaust-fro","url":"/article/device-for-muffling-the-exhaust-fro/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"268"},{"id":1185278,"contentful_id":"3ptqPXh7ci9zvGXegebVti","article_doi":"10.1038/scientificamerican10151904-268","mura_id":"3E1204D2-31EE-437C-B999C80C83C66C49","mura_contentid":"54098DAC-A3A2-084F-8FC4D7F611886EB2","title":"Patent Department","display_title":"<p>Patent Department</p>","slug":"patent-department-1904-10","url":"/article/patent-department-1904-10/","summary":"<p>Convertible Wrench and Vise</p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"268"},{"id":1185242,"contentful_id":"4AV1rHflYdHq2GCHNqLOSd","article_doi":"10.1038/scientificamerican10151904-268a","mura_id":"105C417B-0F9B-4376-A684D519B4D6297D","mura_contentid":"540939C5-A5EF-766A-7F5A28C396A6822A","title":"A Portable Pneumatic Duster","display_title":"<p>A Portable Pneumatic Duster</p>","slug":"a-portable-pneumatic-duster","url":"/article/a-portable-pneumatic-duster/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"268"},{"id":1185239,"contentful_id":"OvqUA2iKhGpp4rJzGQIrH","article_doi":"10.1038/scientificamerican10151904-268d","mura_id":"2BC2DA27-7016-4D01-A0127ACF06F1D09E","mura_contentid":"54097EFE-D059-A58D-17C6267F642A3003","title":"Oddities in Invention","display_title":"<p>Oddities in Invention</p>","slug":"oddities-in-invention-1904-10-15","url":"/article/oddities-in-invention-1904-10-15/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"268"},{"id":1185240,"contentful_id":"1O9c9HoBjgTT597pJ4B7Fy","article_doi":"10.1038/scientificamerican10151904-268b","mura_id":"D267D3CB-4055-4F0C-BE83615AF5CB69EE","mura_contentid":"5408A438-AC29-9333-5001F36D2185CCA9","title":"Fruit and Potato Sorter","display_title":"<p>Fruit and Potato Sorter</p>","slug":"fruit-and-potato-sorter","url":"/article/fruit-and-potato-sorter/","summary":"<p></p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"Technology","subtype":"news","column":"Features","page_number":"268"},{"id":1185249,"contentful_id":"37IpXfQFplDbnTNojUzAyI","article_doi":"10.1038/scientificamerican10151904-271","mura_id":"47E8C87B-3A48-4977-8D558F36DC68DE5C","mura_contentid":"5409273D-0330-CD44-847C8398A071471F","title":"Business and Personal Wants","display_title":"<p>Business and Personal Wants</p>","slug":"business-and-personal-wants-1904-10-15","url":"/article/business-and-personal-wants-1904-10-15/","summary":"<p>HEAD THIS COLUMN CAREFULLY.-You will tind inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will Fend you the name and address of the party desiring the information. In every ease it is necessary to give the number of the inquiry</p>","authors":[],"image_url":null,"image_width":null,"image_height":null,"image_alt_text":null,"image_caption":null,"image_credits":null,"image_desktop_url":null,"image_desktop_width":null,"image_desktop_height":null,"image_block_syndication":false,"media_url":null,"media_type":null,"release_date":"1904-10-15T00:00:00-05:00","digital_column":null,"digital_column_slug":null,"category":"The Sciences","subtype":"news","column":"Features","page_number":"271"}]}},"meta":{"title":"Scientific American Volume 91, Issue 16","canonicalUrl":"/issue/sa/1904/10-15/","image":"https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg","tags":{"description":""Arsenic Needed for the Body and Found in Different Foods", "Experiments on the Mosquito", "Big Guns for Future Warships" and more","og:description":""Arsenic Needed for the Body and Found in Different Foods", "Experiments on the Mosquito", "Big Guns for Future Warships" and more","og:image":"https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=1200","og:image:alt":null,"og:type":"website","og:url":"https://www.scientificamerican.com/issue/sa/1904/10-15/","twitter:title":"Scientific American Volume 91, Issue 16","twitter:description":""Arsenic Needed for the Body and Found in Different Foods", "Experiments on the Mosquito", "Big Guns for Future Warships" and more","twitter:image":"https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg?w=1200","twitter:image:alt":null},"jsonLD":{"@context":"https://schema.org","@graph":[{"@type":"PublicationIssue","@id":"https://www.scientificamerican.com/issue/sa/1904/10-15/","datePublished":"1904-10-15","description":"Scientific American Volume 91, Issue 16","hasPart":[{"@type":"Article","about":"\\"Cyclone\\" or \\"Tornado\\"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Correspondence - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Recently Patented Inventions - October 15, 1904","image":null},{"@type":"Article","about":"Hints to Correspondents","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Notes and Queries - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"New Books, Etc. - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Index of Inventions - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Patents - October 15, 1904","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Arsenic Needed for the Body and Found in Different Foods","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"T. H. Evans","url":"www.scientificamerican.com/author/t-h-evans/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Experiments on the Mosquito","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Big Guns for Future Warships","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Elevator Fatalities and Their Prevention","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Municipal Bakery Experiments in Sicily","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Automobile Notes","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"George E. Walsh","url":"www.scientificamerican.com/author/george-e-walsh/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Automobile Steel Specialties","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"The Diving Horse","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"The Taxometer","image":null},{"@type":"Article","about":"By Our Berlin Correspondent","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Transportable Wireless Telegraph Station for War Purposes","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"S. Frank Aaion","url":"www.scientificamerican.com/author/s-frank-aaion/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Insect Wings","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Dastardly Attempt to Wreck the \\"Connecticut\\"","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"The \\"Cire-Perdue\\" Process of Bronze Casting","image":null},{"@type":"Article","about":"By the Special Correspondent of the Scientific American","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Exhibits in the Boiler House and the Palace of Machinery, St. Louis","image":null},{"@type":"Article","about":"","author":[{"@type":"Person","name":"Charles B. Hayward","url":"www.scientificamerican.com/author/charles-b-hayward/"}],"datePublished":"1904-10-15T00:00:00-05:00","headline":"A Novel Suspension Bridge","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Device for Muffling the Exhaust from Engines","image":null},{"@type":"Article","about":"Convertible Wrench and Vise","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Patent Department","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"A Portable Pneumatic Duster","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Oddities in Invention","image":null},{"@type":"Article","about":"","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Fruit and Potato Sorter","image":null},{"@type":"Article","about":"HEAD THIS COLUMN CAREFULLY.-You will tind inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will Fend you the name and address of the party desiring the information. In every ease it is necessary to give the number of the inquiry","author":[],"datePublished":"1904-10-15T00:00:00-05:00","headline":"Business and Personal Wants","image":null}],"image":"https://static.scientificamerican.com/sciam/cache/file/A029FCA5-FF39-4E5A-A5350E5B23D0CFF9_source.jpg","isPartOf":{"@type":["Periodical","PublicationVolume"],"@id:":"vol91","name":"Scientific American Magazine","publisher":"Scientific American"},"issueNumber":"16","url":"https://www.scientificamerican.com/issue/sa/1904/10-15/"}]}},"dataLayerContent":{"content":{"articleDoi":"","authors":[],"canonicalUrl":"","categories":"","collectionId":"","collectionName":"","column":"","containsMedia":"","contentId":"","contentDifficulty":"","contentModeling":[],"durability":"","editors":[],"isPartner":false,"isResalable":false,"isSyndicated":false,"journalIssueName":"Scientific American Volume 91, Issue 16","language":"en","partnerName":"","platform":"hopper","paywallExempt":null,"podcastSeries":"","primaryCategory":"","printDek":"","printTitle":"","publishedAtDate":"1904-10-15","publishedAtDateTime":"","publishedAtTime":"","sentiment":"","subCategory":"","title":"Scientific American Magazine 1904-10-15","type":"issue","updatedAtDateTime":"","advertiser":"","campaign":"","isSponsored":false},"game":{"gameId":"","puzzleType":"","set":"","dek":""}},"abTestGroup":"3"},"bundle":"issue"}`)</script> <script data-layer="footer">;OptanonWrapper=()=>{};consentQueue=[];tp=[];pdl={requireConsent:'v2'};window.dataLayer=[];;window.__ads=[];_sf_async_config={};_cbq=[]</script> </body> </html>