Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 218
n through these points of shadowis the required shadow. 33. In Fig. 10 the given line al> is in space and the prob-lem is to find its shadow on two rectangular planes mnop and nrso^both perpendicular to H. Consider first the shadow of db on the plane innoj). Theedo-e no is the limit of this… … ah, the part ac falls on the plane 7nnop and the remainder, c5, onthe plane 7i7so. To find the shadow of ac on the left-hand plane we must firstdetermine our ground line. The ground line will he that pro-jection of the plane receiving the shadow which is a line. In thisexample the vertical…
Architecture · Building · Carpentry
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