Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 135
e 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, with radius i, drawan arc till it meets the radius ain A, and from 2 till it meetsthe radius b in… … 173. To draw the logarithmic spiral.. The logarithmic spiral was discovered by Descartes,also called the equiangularspiral, because the angle thecurve makes with the radiusvector is constant. The curvealso bears a constant proportionto the length of the radiusvector Take any line AC for theradius…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
