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The printer's grammar. Containing a concise history of the origin of printing; also, an examination of the superficies, gradation, and properties of the different sizes of types ... tables of calculations; models of letter cases; schemes for casting off copy, and imposing; ... with directions to authors, compliers, &c. how to prepare copy, and to correct their own proofs / Chiefly collected from Smith. Public Domain Mark. Source: Wellcome Collection.