First principles of mechanical and engineering drawing (1897)
Holt-Butterfill, H · London : Chapman & Hall · leaf 203
ength 2y, equal to c2, and through point y draw yx,parallel to 2 3; join 3 and x, and the development is completed. Ifthe resultant figure (the envelope of the prism) be cut out in paper,and treated in the same way as that of the cube, it will be found to fitthe solid exactly. 82. As the surface of… … Fiy. 192
Mechanical drawing
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