Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 55
Cross-section of the Roosevelt, Commodore Pearys new Arctic ship. Reproduced by permission from the Scientific American, New York. Wrought iron exerts about as much resistance to compressionas to tension; so does steel. For this reason, and on account oftheir great strength, they have immense value… … Pair of compasses stretch a rubber strip. such as are sold for blackboard use by the Milton Bradley Co., Spring-field, Mass., at 50 cents. At each tip fasten, by the ring provided withthe compasses, a chair castor such as may be had at any hardware store.Join the tips of the castors by a rubber…
Inventions · Inventors
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Cosmographia Francisci Mavrolyci Messanensis Sicvli : in tres dialogos distincta, in quibus de forma, situ numerʹoq[ue] tam coelorum q[uam] elementorum, alijsq[ue] rebus ad astronomica rudimenta spectantibus satis disseritur (1543)](https://img.insideoutlibrary.com/img/200/ia-cosmographiafran00maur-177-0.webp)
