Sheraton, Thomas; Bensley, Thomas; Mathews, James; Bensley, Thomas [Oth.]; Mathews, James [Oth.]; Terry, George [Oth.]; Jordan, Jeremiah Samuel [Oth.]; Wayland, L. [Oth.]: The Cabinet-Maker And Upholsterer's Drawing-Book: In Three Parts (London: Printed For The Author, By T. Bensley; And Sold By J. Mathews ... C. Terry ... J.S. Jordan ... L. Wayland ... And By The Author, 1793)

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will the radial Pv cut the vaniihing line HL; for Pv is parallel
to the original line Z X.

Of Points, in PerfpePlive, produced by the Interfedlions of the
preceding Lines.
As the intcrfeclions of planes with each other generate or
produce lines, fo alfo hues meeting or cutting each other pro-
duce points.
Hence the following points in perfpedtive are produced by
the intcrfeftions of the lines which we have now defined.
Firft, the point of fight, or the place of the eye; P is that
point where the fpedfator’s eye ought to be placed in viewing
the picture. Hence, if through the eye P a line perpendicular
to the original plane be produced till it cut the parallel of the
eye F M, their point of interfediion is the point of fight P.
Second, the center of the picture. If from the point of
fight P a line be drawn perpendicular to the picture, and be
produced till it cut the vanifhing line HL, their interfeflion
will be the point r, or that point termed the center of the pic-
ture;