Notes on technical sketching and free hand lettering for engineering students (1912)
Smith, Alton Lincoln, 1867- [from old catalog] · Worcester, Mass., The author · leaf 23
Pic s 21 Sectioning planes may be taken in any way to facilitate the explanation of the object, but they are usuallytaken parallel to some one of the planes of projection. Unless the location of the cutting plane is perfectlyobvious, it should be indicated by its projection on the plane to which it…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
