Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 244
are also onthe surface of the sphericalhollow since they are on theline of intersection xywhich lies in that sphericalsurface. With one auxil-iary plane we thus obtain two points in the shadow of the hollow. In Fig. 30 a number of auxiliary planes have been used to obtaina sufficient number of… … 197 28 SHADES AXD SHADOWS 74. The separate and successive steps in this method ofdetermining the shadow of an object by the use of auxiliary planesare as follows: 1. Determine the shade line by applying to the object theprojections of the ray of light. 2. Pass the auxiliary planes through the…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
