Perspective, or, The art of drawing what one sees : explained and adapted to the use of those sketching from nature (1872)
Collins, W. H. (William Henry) · London : Longmans, Green · leaf 35
outside and a great portion of the premises of a factory are visible. They appear to be standing on a slope, and are some¬ thing of the nature of a bird’s-eye view. If we wished to take a map of the earth, we should have to resort to some other kind of drawing. As can be imagined, the earth could… … each successive point, a, b, c, &c., he would see more as he receded, but would never, until he was in¬ finitely far away, see the whole hemisphere, sup¬ posing his sight to be strong enough. The rays to his eyes would then cease to form a cone. They would be parallel, and the drawing formed by…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
