Burn, Robert Scott · London : Ingram, Cooke, and Co. · leaf 67
he angle formed by the two extreme visual rays from both sides of theobject should not exceed 60°, which is therefore denominated the angle ofvision. The diagram, fig. 16, gives a correct idea of this angle, and ofseveral others useful in the practice of perspective drawing. An angle of60° is found…
Drawing · Wood-engraving
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
