Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 231
It is to be noted that the ray of light from the point ^ in theplinth A passes through the point r^ in the shade line of theprism B. In finding the shadow of this point at r^ we thereforehave found the shadow also of one end of the shade line n7\Since nr is vertical, its shadow will be vertical on… … s p DC o w J; ** si w 2Q o a Pocen
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
