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 45
38 THEORETICAL AND PRACTICAL GRAPHICS. The proportions given are slightly different from those recommended in the report* of the com-mittee appointed by the American Society of Civil Engineers to examine into the proper relations to … each other of the sections of railway wheels and rails. There was quite general agreement as to the following recommendations: a top radius of twelve inches; a quarter-inch corner radius; vertical sides sigr- eo- I 2^ IN.
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
