Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 127
red in the rudearmory of primitive man. Descended from his flint knife is the abounding variety of steelcutting tools all the way from the razor, concave on both sides,to the axe, doubly convex. As the arts have become more special-ized, as artificial power has been introduced, the contrasts ofthe… … Carving chisels and gouges. man to exert great leverage formerly more in use than to-day with gimlet points they break their own paths blade of grass. The kniveswhich divide leather, rubber,and rope, differ much fromone another; the knife whichseparates the leaves of abook serves best when…
Inventions · Inventors
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