Elementary linear perspective of form and shadow ... Complete in itself ... For draftsmen, artists, and industrial drawing courses in preparatory and high schools, etc. In two parts.. (1891)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 59
at its vertex, V. Hence a planemay be made to rest on this convex surface, along any one of itsstraight lines. This plane will be tangent to the convex surface. When this plane contains the point of sight from which the coneis viewed, it will be a visual tangent plane, and the line on the conealong… … Fig. 27. In Fig. 27, let E be the point of sight from which the coneV-ATB is seen. Then, as all the lines of the convex surface meetSt the vertex, V, the two tangent visual planes through E, will alsc 50 LINEAR PERSPECTIVE. pass through V, and hence both will contain the visual ray EVthrough the…
Perspective · Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
