An introduction to the science & practice of photography (1888)
Jones, Chapman · London : Iliffe & Son · leaf 88
ent of the object is towards the thinner part of the interposed substance, because we cannot but imagine that the light entering our eyes has come in a straight line. In figure 10, B, the passage of light through a prism is Fjg. 10. shown, and the apparent displacement of an object viewed directly… … Fig. 11. these two arrangements are made circular, so that the diagrams represent the plane obtained by cutting along any diameter, these two combinations are typical of the twTo sorts of lenses. The surfaces of lenses are always curved that they may be continuous, and for convenience in manu-…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
