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
IM MECHAOTCS. … Fig. 210. P M will represent the direction of the resultant through the mass. Sus-pend the same mass again from Q, the resultant will now take the direc-tion Q E, and the two resultants have one point C, their intersection incommon; this point is called the centre of gravity; all the weight may…
