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, artisans, etc. ... In five divisions .. (1868)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York : J. Wiley & son · leaf 87
intersection of a ray of liglit, through that point,with the given surface; we can, by the principles just given, findwhere the rny of light through any point pierces the planes of ])ro-jection, or any other planes parallel to them ; the p(;int, and theray of light, being given by their… … Fig. 1. Fig. 2.
Geometrical drawing · Mechanical drawing
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
