Perspective, a series of elementary lectures (1899)
Cone, Ada · New York, W.T. Comstock · leaf 24
rEEa’ECTI v^E. 18 depending on the direction of the retreating lines of the object to he drawn. All horizontal retreating lines have their Vanishing Points in the Horizontal Line. The Principal Yisnal Eaj, although drawn verti¬ cally in order to represent it on the diagram, represents a horizontal… … Principal Visual Kay: i. e., which retreat at an angle of 90°, find their common point of convergence in the Centre of Vision, and hence the Centre of Vision-is the Vanishing Point for all such lines. As the apparent size of objects varies according to distance it is necessary when proportions are…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Works. Popular edition.] 2 series (1886)](https://img.insideoutlibrary.com/img/200/bl-bl_003191336_9-284-1.webp)
