The technic of mechanical drafting a practical guide to neat, correct, and legible drawing (1904)
Reinhardt, Chas. William (Charles William), b. 1858 · New York, The Engineering News Pub. Co. · leaf 11
pair a considerable length of time, until it is finallyground down so far that the thinning of the points would requiretoo much time to be a paying operation any longer. The paper to be used may either possess a fine-grained or coarse(egg-shell) surface; special recommendations in that respect… … Sectional Plan A-B. on, the writer would ad-vise the use of the smoothor inner side for variousreasons, one of which is thaton the back or unglazedside the lines will invariablybecome ragged or broken,as there is no continuoussurface for the ruling pento glide over. Erasures,furthermore, are almost…
Mechanical drawing
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