Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 258
(2) The length of its projection upon that plane will be equal to the diagonal of a sipiare, of which the given lino is one side. Given the vertical projection of the line ah perpendicular to 207 38 SHADES AND SHADOWS FIG-^^ Y, 2 inches long and i inch from Y, to construct its shadow onY. See Fig.…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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