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 81
by the preceding problem; the figure will touchthe given circle as required. Peob. XLII.—To construct a regular octagon upon a given straight line(fig. 135). Produce the given line A B both ways, and draw pei^Dendiculars A E,B F ; bisect the external angles at A and B by the lines A H, B C,… … Fig. 18G. Pkc.u. Drawwith A e]t<Milts so XLTTT.—To convert a square into a regular octagon (fig. 130).tlic (liai^oiials of the scpiare cutting at ^y fn^iu the corners A,P), C,D,as radius, descnl)e aics cutting tlie sides at [/ //, c^^c.; join thefound to (•oin])Ute the octagon. GEOMETRICAL…
