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 34
Vertical Section. … Horizontal Section.B. Fig. 64. 31 and the drawing of the DAuria Pump on plate VI. This leavesthe eye to supply the missing shading, and answers well. The littleflat freehand shading on the latter figure used sparingly helps inthis particular case to give flat effects against the curved…
Mechanical drawing
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