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 134
PROBLEMS INVOLVING THE ISOMETRICAL DRAWING OF CIRCLES. 89 sides of the circumscribing square at their middle points, as theyshould be, since C/and Be are perpendicular to these sides at theirmiddle points. Now in order that the small arcs, fbh and goei shouldbe both tangent to the former arcs and…
Geometrical drawing · Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
