Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 437
wer Fv heIlx;The resolution must, therefore, be made with reference to anormal at a helix midway between the newel and outer sur-face. This helix, like all others, is situated upon the sur-face of a cylinder of which the axis coincides with that ofthe screw. Denote the radius of this cylinder C… … distance from each other equal to a helical interval, andequally distant from m,v. If we now develop the portionof the cylindrical surface, included between the cutting-planes, on the tan- gent plane, the sur-face of the cylinderwill become a rectan-gle whose base A Eis equal to 2*7*, andwhose…
Mechanics · Acoustics · Optics
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