A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 59
Fig. 54 Exercise 30.—Ionic volute. Figs. 51, 52, 53 and 54.Fig. 51 is an illustration of the volute spiral of an Ioniccapital in classic architecture (Fig. 54). In laying 56 A PRACTICAL COURSE IN out such a curve, either method. Fig. 52 or Fig. 53,may be used with the same results. When AB is… … Fig. 55 the semi-diagonal of the square into three equal partsand construct squares through these points, as in Fig.52. Each corner of these squares is a center for quad-rants of the outer spiral starting with radius A. Theinner dotted squares are drawn to pair within thefirst squares, a distance…
Mechanical drawing
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