Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 231
Barrel of pressed steel. 186 PROPERTIES—METALS … Range front pressed from sljeet steel, In large manufactures as in small the hydraulic forge haswrought a quiet revolution. If a steel freight car were producedby planing, turning, slotting and similar machines, it would be much heavier and dearerthan as turned out to-dayfrom ingeniously…
Inventions · Inventors
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