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 50
32 PERSPECTIVE DRAWINa. their places. The angle at e is obviously the same as that at e. If a drawing should contain the vanishing points of only two lines making a known angle, we can, Fig. 15. o … by the converse of the above, find the position of the point E or the distance of the eye from the paper. We know that the eye is situated on the per|)endicular from the point c. We know also that the two vanishing points subtend the known angle. If we suppose the line c o turned upwards, so as to…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
