Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 324
ource of Ught; b (38, 10, 8) is the center of a sphere IJ APPENDIX 307 in diameter; c (50, 11, 16) d (36, 20, 12) is a line. Determine theshade hne and shadow of the sphere, also the shadow of cd on thesphere and on the planes of projection. EXERCISE SHEET CIX (§214) Cast the shadows on the band… … Fig. 270 308 DESCRIPTIVE GEOMETRY EXERCISE SHEET CXI (§216) Determine the shade hne and shadow, also the shadow on H, forthe double-curved surface in Fig. 271. Use a point source of light onthe left border line, 11| above H and 9i in front of V.
Geometry, Descriptive
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