A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 391
6 any solid whose edges are parallel may be located here. Inthe case of solids having curved surfaces, it may be statedthat, if it is possible to draw a series of parallel lines onsuch surfaces, the development of the solid may be pro-duced by the same methods given for this class. The firstgeneral… … Fig. 4 applied to the pyramid, it is found that the lines indicatedon the paper converge to a point, as shown in Fig. 4 {a)and {b). It is noticed, also, that this point o. Fig. 4, definesthe position of the vertex of the pyramid. The same may besaid of the cone, illustrated in Fig. 5 (<^) and…
