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 82
Fig. 138. Pkob. XLY.—To describe a regular octagon about a circle (fig. 138). Describe a square about the given circle A B; draw perpendicularsh A, &c., to the diagonals, touching the circle. The octagon so formed isthe figure required. Or, to find the points A, ^, &c., cut the sides from…
