Elements of lettering ... A treatise on the history, classification, and practical application of the various styles of letters of the alphabet (1899)
International Correspondence Schools · Scranton, The Colliery engineer company · leaf 79
s are neartogether, is to place oneedge of a triangle, as a b,Fig. 98, on the given line c d, and lay the other triangle, as B,against one of the two edges, holding it fast with the left hand ;then move the triangle A along the edge of B. The edge a b willbe parallel to the line c d; and when the… … Fig. 97.
Lettering
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