Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 260
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… … light BH and AP tangent to the circle, and is equal to the diameterof the sphere. The points M and N, which determine the ends ofthe major axis, are the apexes of equilateral triangles PMH andPNR, constructed on the minor axis as a base. 97. Problem XXX. To construct the shade line of a torus. Fig.…
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
