A Dictionary of science, literature, and art [electronic resource]: comprising the history, description, and scientific principles of every branch of human knowledge; with the derivation and definition of all the terms in general use (1844)
Brande, William Thomas, 1788-1866, Cauvin, Joseph · New York : Harper & brothers · leaf 932
ti h.will be seen to be the line of heights,on which all heights are to be set out. The perspectiveextent of a circle is easily obtained by lines bounding itsconvexity, transferred by the visual rays s k r n to the pic-ture, which, aided by the diameters, will give the formrequired. To give the… … Eye. to the plane of the picture at any angle v h a. The vanish-ing points of all lines parallel to a b are found by a linefrom the eye parallel to a b, cutting the picture in V. Si-milarly, V is found to be the vanishing point of all linesparallel to cd. If ab be continued to A, it gives the…
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