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 40
points, of which a radius on the ground plane is composed, would constitute the plane of that radius. The planes themselves intersect the horizontal planes at right angles ; but the perspectives of such vertical lines will be limited in height by the per- spectives of the highest horizontal lines… … After the descriptions of former diagrams, this cannot need any explanation, further than to say that the horizontal lines represent the parallels of equi- distant lines on the superior and inferior horizontal planes; and the vertical lines stand on the extreme points of the lower parallels, and…
Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
