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 32
shading, fairexamples of which are given underFig. 58, and on plate V. (Man-hole-Section), would be difficult toformulate and could not alwaysbe applied successfully; thereforethe writer will content himselfwith giving a few concise hintsrelative to the subject matter forthe guidance of the…
Mechanical drawing
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