A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 283
ed number of points in any view,but the foot of such line of sight is always represented inthat view by one point on the drawing. The student whois to read that drawing must picture to himself, or imagine,the position of these points as they are supposed to exist inthe object of which any drawing… … Fig. 6to consider the elevation alone, without paying any atten-tion to the plan, we Avould say that the point E representedmerely some other point (imaginary, of course) that couldbe situated anywhere on the line of sight KE. A glance atthe plan, however, shows not only where the location is,but…
