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 99
1^-^-7 Fig. 174. Tlie Involute. Tlie involute is a curve traced by the extremity of a flexible line un-winding from the circumference of a circle. h :i … Piioij. LXIX.—To doicribe an involute. Dividetlie circumference of the given circle (fig. 175) into any mmibcr GEOMETRICAT. PRORLE^IS. 79 of equal parts, as 0,1, 2, 3, 4,....; at each of these points draw tangents tothe given circle; on the first of these lay off the distance 1 1^, equal to thearc…
