Elementary projection drawing. Theory and practice. For preparatory and higher scientific schools, industrial and normal classes; and the self-instruction of teachers, inventors, draftsmen, and artisans. In six divisions .. (1880)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 183
f cir-cles. Let Fig. 7 be the oblique projection of a cube, with circlesinscribed in its three visible faces. One of these circles, abed, willappear as a circle, and so would the invisible one on the parallelrear face. For the ellipse in BCDG, draw the diagonals, BD and CG, of 110 OBLIQUE… … Kg.*. and A, by their intersections with the diagonals BD and CG. The middle points of the sides of the face BCDG, are also points of theellipse, and are its points of contact with those sides. The ellipsealso has tangents at h and/*, parallel to BD, and at u and />, paral-lel to CG. Hence,…
Geometrical drawing · Mechanical drawing
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