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 27
t the lighted sides of the respective areas is left open,thereby enhancing the effects of light andshade ; the time expended in ruling in thenecessary pencil lines defining such spacesis well paid for by the improved appear-ance of the sections afterwards. The£ section-lining for stone, as the…
Mechanical drawing
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