Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 241
ow a^^ is determined, there-fore, as follows: The point <;/^, lying on thediagonal Vo^ is evidentlythe point in the shade lineMhich will cast the hijjhestpoint in the shadow, for, con-sidering points in the shadeline on either side of «^, itwiL become evident that therays through them must… … a line of intersection exactly like the profile «^c^. If we revolvethe plane P and its line of intersection about the axis ob untilit is parallel to Y, the line of intersection will then coincide withthis profile cCc, the point «^ having moved to the point a^. If, before revolving, we had drawn the…
Architecture · Building · Carpentry
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