The clinical use of prisms; and the decentering of lenses (1893)
Maddox, Ernest Edmund, 1860-1933 · Bristol : J. Wright ; London : Simpkin, Marshall, Hamilton, Kent · leaf 22
Fig. 6.—A circular prism. in Fig. 7 is intended to show how a circular prism isrelated to a rectangular one, as though it were cutout of it. … Fig. 7.—A hypothetical illustration to show the relation of acircular prism to a rectangular one. Apex and Base.—The thinnest part of a circularprism is called the apex. It is the point where thetwo refracting surfaces meet, or most nearly meet.The base of a circular prism is the thickest part…
Lenses
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
