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 79
two of the angles A, C, of the triangle ABC, by lines cuttingat D ; from D draw a perpendicular D E to any side, as A C ; and withD E as radius, from the centre D, describe the circle required. Wlien the triangle is equilateral, the centre of the circle is more easilyfound by bisecting two of the…
