Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 224
e of the shadow of the plinth. It will be noted that d-a^ is a 45^ line, which Mould beexpected since the edge do is perpendicular to V. 40. Considering next the prism B, we find by applying theprojections of the rays of light to the plan, that the front andleft-hand faces are in li<j;ht, and… … It is to be noted that the ray of light from the point ?■ in theplinth A passes through the point Vj^ 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 nr.Since nr is vertical, its shadow will be vertical…
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