Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 136
et AC be the radius vector.Bisect it in D. With D ascentre, and radius DA, draw anarc cutting the next radius CBin B. Proceed in the samemanner with each radius in suc-cession, which will determinethe points H, K, L, M, N, O,P, etc. Draw a fair curvethrough these points, and we shall obtain a… … Fig. 239. 174. To draw a spiral adapted for the Ionic volute by means of arcs. Divide the given height AB into eight equal parts (Prob. 9). Bisect the fourth part in the point C (Prob. i), and from it CONIC SECTIONS. [23 draw a line perpendicular to AB (Prob. 7).equal in length to four of the…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
