Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 166
Fig. 299. Fig. 300. })lane of the projection, the shadow being thrown upon two plane surfaces at an angle to each otl>er. 150 SHADES AND SHADOWS. In every drawing where the shadows are to be inserted, it is of the utmostimportance that the projections which represent tiie object whose shadow…
Mechanical drawing
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