Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 111
his intersection will be a point in thepicture plane. It is evident that its vertical jDrojection must coin-cide with the intersection itself, and that its horizontal projectionmust be in HPP (§ 32). But this intersection must also be onthe visual ray through the point a, and consequently the… … Fig. 9
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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