Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 82
to give access to twotubes instead of one, lessening the lines of juncture along whichleakage may occur. It was a memorable day when first a round log or stick wasthrust under a burden, easing its motion and leading to the wheelby piecemeal improvements. A section cut offfrom the end of a round log… … Bullock cart with solid wheels. wrights of old soon found that a wheel need not be solid, thatstrong spokes, a sound rim, and a metal tire embody the utmoststrength and lightness. Roller and ball bearings much extendthe benefits of simple wheels; they lessen friction in the besttypewriters,…
Inventions · Inventors
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