A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 108
dent should be able tosee the reason for the usingor omitting of any shadelines on the drawings in thefollowing plates. In the caseof an object like the hex-agonal prism in Fig. G,Drawing Plate, title: Pro-jections—I, no part of theupper base or line Se isshaded, although, strictlyspeaking, the… … Fig. MECHANICAL DRAWING Plew. lop I Frohk iHew.A ce:n^ter liio]S 1. Fig. 1 represents a thick wedge having a cyHndricalhole running through its entire length. The lines inii^pq^and }-s are called centerlines. Center lines are usu-ally drawn through the cen-ter of anything that is round,such as a…
