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 644
ISOMETKICAL DKAWING. 409 e5, a 2, hi, dS, c4:, by the parallels; having thus the major and minoraxis, construct the ellipse by the trammel, or since the curve is tangent atthe centre of the sides, Ave have eight points in the curve; it may be putin by sweeps or by the hand. … Fis. 10. To Divide the CivcumfeTence of a Circle.—First method. On thecentre of the line A B erect a perpendicular C D, making it equal to C Aor C B; then from D, with any radius, describe an arc and divide it inthe ratio required, and draw the divisions radii from D meeting A B ;then from the…
