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 557
VJ^ Fig. 25. When the first letters are alike and the last different, theangle C B B will be the sum of the two bearings. TOPOGRAPHICAL DRAWING. 359 Fig. 26. When the first letters are different and the last alike, sub-tract the sum of the bearings from 180° for the angle C B B: Avhen boththe first…
