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 148
lis of an inch, or whatever fractional parts may be adopted for the other weights, it will represent the weight of C in lbs. (in this case about 5|- parts, or lbs.), and the direction in which C acts; the work of the weights P and TV is to support C, and this would be done by a force equal to C,… … Fig. 20S 112 MECHAOTCS.
