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 86
be described. Should tlie triangle be largeenongli to embrace tlie wliole circle at once, tlie opposite quadrants A Cand B D may be divided with the same setting of the triangle. A short method of dividing a line or surface into a number of equalparts is illustrated by fig. 147; and it is… … plain, does not afford the subdivisions when applied directly; but if 14inches of length, or double the number of parts, be applied obliquely acrossthe space between the parallels A B, C D, so as to measure it exactly,then point off two-inch intervals on the edge of the rule, and in this way7 equal…
