Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 134
Join the points AC, CD, DE, etc. Find the centre K of the circle containing the arcABC (Prob. 35). Join CK.Bisect the line CD at rightangles, and produce thebisecting perpendicular till itmeets CK produced in L.Join DL. Bisect the line-^]g^i^A produce The oisecting\ierpendicular till it meetsDL… … CONIC SECTIONS. njiijdf^Q construct an Arcliimedean spiral of one revolution.Draw a circle and divide it by radii into any number of equalparts, say twelve (Prob. 9) a^ b^c, d^ etc. Divide the radius ointo a corresponding numberof equal parts i, 2, 3, 4, etc.(Prob. 9). From the centre ofthe circle,…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
