A rudimentary and practical treatise on perspective for beginners : simplified for the use of juvenile students and amateurs in architecture, painting, etc., also adapted for schools and private instructors (1866)
Pyne, George · London : Virtue Brothers & Co. · leaf 118
e of the eye, as well assome proficiency in the science of optics ; the form of the eye, of the lens,or crystalline humour within it, and the density of the humours both infront and behind the lens, all have an influence on the direction of therays of light, so as to bring them to such a focus as… … line in the picture are the two rays from the extremities of theline; by these alone we are enabled to determine the perspec-tive position of the two points from which the rays proceedon the paper or canvas, when a line drawn from point topoint must be the representation of the straight line. In…
Perspective
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