Second grade perspective, (theory and practice) : specially prepared for the use of art students (1893)
Dennis, H. J · London : Baillière, Tindall, and Cox · leaf 20
11 know the distance of the eye from the picture-plane, the height of the eye the eye with the directing-line ; for if a semicircle be described from the above the ground-plane, the actual dimensions of such object, and its posi- eye as centre, it will contain 180 degrees, and if 60 degrees be cut… … either side of the eye with the directing-line, an arc of 60 degrees will re- In the practice of perspective the picture-plane is represented by the main in the centre which is bisected by the principal visual ray, Fic. 14. paper upon which the drawing is made, and although the eye, and the lines…
Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
