Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 326
urce of light; b (38, 10, 8) is the center of a sphere U APPENDIX 307 in diameter; c (50, 11, 16) d (36, 20, 12) is a Une. Determine theshade Ime 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… … T^^ 4H^ L Fig. 270 308 DESCRIPTIVE GEOMETRY EXERCISE SHEET CXI (§216) Determine the shade line and shadow, also the shadow on H, forthe double-curved surface in Fig. 271. Use a point source of light onthe left border line, llj above H and 9i in front of V.
Geometry, Descriptive
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