Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 131
rcle at F; draw FE perpendicular to BC, cutting curve inG; join AG, which will be a tangent, to the curve. (Fig. 99.) No. 26.—To draw an oval of a given width. Let AB be the given width; bisect it in C, and on it describethe circle ADB; draw CD at right angles to AB; with centreB and distance BA… … No. 27.—To construct the involute of the circle. Divide the circle into any number of equal parts and drawthe radii, numbering them 1, 2, etc. Draw the tangents, mak-ing the first the length from 1 to 2, the second twice thislength, the third three times, and so on. When all the tan-gents have been…
Geometrical drawing · Perspective
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