Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 163
Fig. 289. n 146 ORTHOGRAPHIC PROJECTION. minated by a diameter inclined at an angle of 45°, the shade being a graduatedone, as shown in Fig. 288. Fig. 289 is an example of this method. In a second method the elevation is shaded, as in the foregoing, but in theplan the light falls from the lower… … Fig. 290. recesses shaded. Examples of this method are shown in Fig. 290. In theorthographic projection of solids the boundary lines between surfaces in thelight and shadow are made heavy. Still another method is described in the following chapter on Shades andShadows, where the light falls over…
Mechanical drawing
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