Handbook of the practice and art of photography (1875)
Vogel, Hermann Wilhelm, 1834-1898, Molling, Edward F · Philadelphia, Benerman & Wilson · leaf 319
. e., the angle of incidence is like the angle of reflection. OF THE PERSPECTIVE. When we look at a cube (Fig. 102), the sides of which being of equal length, we will find that they appear to our eye of very differ- ent length. The surface fronting our eye appears as a square ; the others become… … the circular base, b, which either ap- pears circular when we face it directly, or as an ellipse (which it is not in fact), and the parallel sides of the pillar converge to a point. The reason why we do not notice this falsehood (for such it is) is simply because we are used to it. We know from…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from St. Nicholas [serial] (1873)](https://img.insideoutlibrary.com/img/200/ia-stnicholasserial371dodg-110-112.webp)
