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 88
vely on the same line, as fromI to M, and from M to I^, and the third from I to L; then L K will betlie fourth line required. Prob. LIY.—To find a mean 2yroj[)ortional hetween two given lines (fig.153). Let a h and 5 <? be the given lines. Set off, on a straight line, A B, B C,equal to the given… … Pkob. LY.—To constmwt a triangle eqical in area to a given rectangle. Bisect the base B C (fig. 154) of the rectangle at D, and di-aw the per-pendicular D A equal to twice the height, D E, of the rectangle. DrawB A, A C ; the triangle A B C is equal in area to the rectangle B G. Peob. LYI.—To…
