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 149
Xig-. sss. … *By the deflnitlon of a surface of revolution (Art. 340) any point on it can generate a circle about its axis. If, then, twosurfaces have the same axi^t any point common to both surfaces Tvould generate one ancl the same circle, which must also lieon both surfaces and therefore be their line of…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
