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
adius of C A, cutting the correspondingarcs described from the centre O, and passing through the points A^, A-,A^,.... as before. When the movino; circle A B D is made to roll on the interior of thecircumference A M, A X, as shown (fig. ITtt), the curve described by thepoint A is called an inteyior… … 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
