Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 259
cle. The semi minor axis and two other points cair 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… … 213 44 SHADES AND 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 MN, will be on the projection ofthe ray of…
Architecture · Building · Carpentry
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