Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 434
64+192 uE2s^=z 0.152 X 3.1416 X 6.2832 X 1000 X 0.8 -tt~ttz = 50; that is to say, the quantity of work consumed in one revo-lution by friction on the teeth, in the case supposed, is suf-ficient to raise 50 pounds through a vertical distance of onefoot. XX. THE SCREW. The Screw, regarded as a… … mode ofgenerating; § 240.—To form a clear idea of the figure of the screw screw withand its mode of action, conceive a right cylinder ak, with squaiecircular base, and a rectangle abcm having one of its sidesa b coincident with a surface element, while its plane passesthrough the axis of this…
Mechanics · Acoustics · Optics
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