Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 106
This intersection will be a point in thepicture plane. It is evident that its vertical projection must coin-cide with the intersection itself, and that its horizontal projectionmust be in IIPP (§ 32). But this intersection must also be onthe visual ray through the point a, and consequently the… … Fia.9
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
