A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 435
nces and the posi-tion of points on thesurfaces of cones and pyramids—radial solids—are deter-mined by means of their radial lines, or elements. The sameprinciple must be adhered to Avhen developments of suchsolids are produced. It is essential, therefore, that theselines should be shown in their… … Fig. 26 §16 DEVELOPMENT OF SURFACES 41 other solids. To overcome the necessity for drawing anumber of views, advantage is taken of a principle thatmay be observed during the revolution of the solid. Thisrevolution is effected in a very simple way on the drawingboard, and an illustration of the…
