Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 60
the real length of the lateral edges only when the top view shows that these edges are parallel to the front plane. 60. The Sphere. The solids whose surfaces have been devel-oped illustrate the way in which the development of any solidbounded by faces or by surfaces of one curvature may be… … Fig. 20. 52 MECHANICAL DRA WING. upon the plane. The surface of the sphere is similar to those ofmany other solids which are curved in more than one direction andthus cannot be developed. Though the surface of the sphere cannot be developed, a spheri-cal or other surface of double curvature may be…
Mechanical drawing
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