Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 151
t may be, can befound by determining the centre of gravity of each of the solids of whichit is compounded, and then compounding them, observing that each centreof gravity represents the solid contents of its own mass or masses of whichit may be composed. The centre of gravity of bodies enclosed by… … Fig. 211. MECHANICS. 115 FRICTION, AND THE LIMITING ANGLE OF RESISTANCE. Suppose a mass A (fig. 212) bo pressed upon another, B, by means ofa force acting in a direction perpendicular to the common surface of thetwo bodies, and let a second force Q act also upon it in a direction paral-lel to this…
