First principles of mechanical and engineering drawing (1897)
Holt-Butterfill, H · London : Chapman & Hall · leaf 169
nthe problem will be similar to that given in No. 3 (Fig. 174). Theexception is caused by the altered position of the pyramid. The triangleefg in No. 3 represented & flat surface perpendicular to the VP—oneof the faces of the pyramid—whereas in No. 5, the pyramid havingbeen turned on its axis… … MECHANICAL AND ENGINEERING DRAWING 157 their junction. This line or edge in No. 5 will be a a ; that part of itwhere it passes through the prism being out of sight. From this planNo. 5, find by projection the elevation No. 6 of the solids as if theywere entire. For the lines of penetration that…
Mechanical drawing
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