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 89
higher extremity, arid vice versa. This is self- evident; there cannot be with any one a shadow of a doubt on this head: but as other positions may be given to the line, in which the relative apparent elevation of its extremities is not so self-evident, or so manifest at the first glance, let us… … at once that the ray of light which conveys to the eye the image of the lower extremity is lower in its course towards the eye than the ray of light which conveys the image of the higher extremity, and as it is only by means of the rays of light that
Drawing · Perspective
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
