Haswell's engineers' and mechanics' pocket-book .. (1844)
Haswell, Chas. H. (Charles Haynes), 1809-1907 · New York, Harper & brothers · leaf 76
gth of the arc, and c its chord,or the length of the spindle. SPHERICAL TRIANGLE. pr^^ ^ ; s being the sum of the three angles.180 ANY SURFACE OF REVOLUTION. 2prXl; or, the length of the generating element x the circumference described by its centre of gravity. Illustrations.—Let abcbe the side of… … Parabola. acX{^brXp), p being in this and all otherinstances = 3.1416, b the centre of gravity,and b r the radius of its circumference. MENSURATION OF SURFACES. 69 Or, take a umform piece of board or thick pasteboard, and cut out ^nH £M fi^* ^^ ^■^ ^•J^ ^^eh both pieces togetherand then the figure…
Engineering · Mechanical engineering
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