The apprentice, or First book for mechanics, machinists, and engineers (1860)
Byrne, Oliver · New York, P. J. Cozans · leaf 140
the pier H X ; then suppos-ing the pier to turn upon its outer edge, if the moment ofthis mass exceeds the moment of the horizontal thrust, thestructure will stand, and vice versa. PRACTICAL MECHANICS. i^i Ques. 47. The radius of a semicircular arc is 11 feet, thethickness of the crown 18 inches ;… … Construct a figure on a scale of an inch to the foot, anddividing D Q into six equal parts, it may be found by calcu-lation or measurement, that X = 7.8, A = 5.4, B rr= 3.8,C = 2.8, D = 2, E = 1.6, Y = 1.5, and n = 6, and D Q= 10, and hence s = V^« By the formula it will be found, that D G r=rr…
Mechanics, Applied
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