Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 187
(a) (b)Fig. 133. — Drawing of a Sphere. isometric drawing of a circle having a diameter D. The radius,R, of the circle which represents the isometric drawing of thesphere is one-half the length of the major axis of the ellipse. To draw a half-sphere construct the outline of the sphere asdescribed… … (a) Lower half. (b) Upper half. Fig. 134. — Isometric of a Half Sphere, Fig- 135. —Isometric ofOne-eighth Sphere. To draw one-eighth of a Sphere construct the sphere as de-scribed above and next draw the great circles at right angles toone another as shown in Fig. 135. 130. Isometric Drawing…
Mechanical drawing
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