Haswell's engineers' and mechanics' pocket-book .. (1844)
Haswell, Chas. H. (Charles Haynes), 1809-1907 · New York, Harper & brothers · leaf 85
is the length of an arc of a circle, the base of which is 35 feetand the height or versed sine 8 feet 1 * 8-^35 =.228|5, .228 = 1.1333, .229 = 1.1344, 1.1333X35 = 39.6655, 1.1344X35= 39.7040, 39.7040—39.6655 = .0385, difference of lengths. Hence, as 35 : 20 : : .0385 : .0220, the length for the… … Geometrically.—Let the curve of which the length is required he aba.Extend the versed sine hd to meet the centre of the curve in e.Draw the line ce, and from e, with the distance eb, describe bh; bisect cA in e,and from e, with the radius e i, describe k i, and it is equal half the arc a be. To…
Engineering · Mechanical engineering
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