A manual for teaching model-drawing : from solid forms, the models founded on those of M. Dupuis : combined with a popular view of perspective, and adapted to the elementary instruction of classes in schools and public institutions (1843)
Williams, J. Butler, Sir, Lowry, Joseph Wilson, 1803-1879 · London : J. W. Parker · leaf 94
73 PRINCIPLES OF PERSPECTIVE. … Lines tending to the Left. the left of the street, they would then seem to him to tend towards the left, as the distance increased. To imitate the effect produced by the observer thus changing his position, let the teacher remove the point, towards which the threads converge, to the right of the…
Drawing · Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.