A manual of elementary geometrical drawing, involving three dimensions. Designed for use in high schools, academies, engineering schools, etc. : and for the self-instruction of inventors,artizans, etc. ... In five divisions .. (1867)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York : J. Wiley and son · leaf 93
Fig. 1. Fig. 2. … Fig. 8. Fig. 4 1st. The required point being in the horizontal plane, its verti-cal projection is (by Prin. 1°) in the ground line, GL. 2nd. The point being on the given line, its vertical projection is,by (Prin. 2°), in the vertical projection of that line. Hence b\ the intersection of…
Geometrical drawing · Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
