Excerpt from General Problems in the Linear Perspective of Form, Shadow, and Reflection: Or the Scenographic Projections of Descriptive GeometryAny one, then, who compares Pl. XVII., fig. 111, for example, and its companion Fig. 112, or tender, to supply meaning to it, with Pl. XVII., Fig. 113, will understand how the mind, trained in the modem methods of Descriptive Geometry, loves the fixed horizontal plane to stand upon, and the vertical pl...
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