Notes on technical sketching and free hand lettering for engineering students (1912)
Smith, Alton Lincoln, 1867- [from old catalog] · Worcester, Mass., The author · leaf 38
d States. Depth is.6495p. 93. The International Standard adopted by the metric countries is not shown here. It is exactlythe same shape as the Sellers thread except that the point of the V at the bottom of the thread is rounded■^ of the height. This is an improvement over the Sellers section, in… … ■^ WA5HER ■^S£ HAfli V-ti CAS£ HAf>o.
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
