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The amateur's perspective : being an attempt to present the theory in the simplest form; and so to methodize and arrange the subject, as to render the practice familiarly intelligible to the uninitiated in a few hours of study (1828)

Davenport, Richard, author · London : Printed for the author · leaf 38

An illustration from The amateur's perspective : being an attempt to present the theory in the simplest form; and so to methodize and arrange the subject, as to render the practice familiarly intelligible to the uninitiated in a few hours of study, 1828, leaf 38
22 General Principles and Definitions, [Part I. Let F F, B B, represent the frame of the picture, as in foregoing diagrams. e, the place of the eye. F … The four dotted lines, visual rays from the four angles of the picture, meeting at the eye. fj\ b b , the smaller picture, raised and brought nearer to the eye. It must be diminished in size, so that the dotted visual rays shall cut its four angles at ff, b b ; and then at whatever intermediate…

Perspective

Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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