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 20
pposing objects to be lying on a per- fectly flat extended plane : and when their perspective is understood, proceed to objects raised on the plane, and to different levels. Let A A A A represent a level plain. Let F F, B B represent the exterior or frame of the glass or picture, supposed… … ol, and o’, are objects lying on the ground plane ; and the dotted lines are rays proceeding from those objects passing through the glass, and meeting at the eye of the spectator. We shall now call such lines, the Visual Rays of those objects. A A A A the Level Plane, or Ground Plane, though…
Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
