line, the onewhose plane is perpendicular to the line of sight appears as a true circle, whilecircles having intei mediate positions appear as ellipses with varying degrees ofnarrowness. This principle applies to other figures as well as to circles. It may be seen illustrated in long cylindrical… … P£/iSf£CTHi£ OF PA/^ALLEL C/ftCL£S Fig. 36. MODEL DRAWING 223. A course in model drawing from the object is of value for several reasons. It gives familiaritywith the peculiarities of artificial type forms that are found singly or combined in all engineering constructions.It trains the faculty of…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
