Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 239
aand whose base is hcde^ etc. Theaxis is perpendicular to H and thecone is so situated that its shadowfalls entirely on the V plane. GO. It is evident that the shad-ow of the cone must contain theshadow of its base and also theshadow of its apex. Therefore,if we find the shadow of its apexby… … Gl. This has been done in Fig. 25, in which IS the shadow of the apex «. The ellipse IfH^Hp^^ etc., is the shadow ofthe base, found by assuming a sufficient number of points in theperimeter of the base and finding their shadows. The ellipsedrawn through these points of shadow is evidently the…
Architecture · Building
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