Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 264
cle. The semi minor axis and two other points can be deter-mined as follows : Through the points, A, o, and B, draw vertical and horizon-tal lines, intersecting in the points E and D. The points E and D are two points in the required shade line. Through the point E draw the 45° line EF. Through the… … 213 44 SHADES AKD SHADOWS minor axis. The shadow of the sphere on the co-ordinate plane willalso be an ellipse. The center of this ellipse, o*, will be the shadowof the center of the sphere. It will be determined by ProblemXYII. The ends of the major axis MIST, will be on the projection ofthe ray…
Architecture · Building
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