Warren, Samuel Edward, 1831-1909. [from old catalog] · New York, J. Wiley & sons · leaf 66
ach of these elements with the upper base, is, in general, a pointcasting a shadow on the other element. Construction,—?\. Y., Fig. 18. AGL and AH—V—AHare the projections of the cone, and YN—YE, of the raythrough the vertex, which pierces the horizontal plane at N,E,and the plane of the upper base… … PI V
Shades and shadows
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