Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 30
varying both the strength of the line and the spacing. 71. The difference between the shading on the exterior and interiorH of a cylinder is sharply contrasted in Fig. 38. On the concavity thedarkest line is at the top, while on the convex surface it is near the Isot-tom, and below it the spaces…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
