Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 45
100,000 pound steel ore car built by the Standard Steel Car Co., Pittsburg, for the Duluth, Missabe & Northern R. R. Of structural steel throughout. Weight unloaded, 32.200 pounds. roof have a contour which enlarges at the extremities. ^? … Section of Etandard bull; angle column, New YorkSubway. THE FIRST AMERICAN RAIL 13 By all odds the most important girder is the rail in railroadservice. Let us glance at phases of its development in America,as illustrating the importance of a right form toefficient service. At the outset of its…
Inventions · Inventors
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-425-194.webp)
