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 29
er not being so rapid as 14 PRISMS. progression through air. If the canal lie straightacross their path, so that all the men in the frontrank reach the bank and enter the water simultane-ously, the column has the direction of its frontunchanged. When light comes from a considerabledistance, the… … Fig. 9.—To illustrate refraction of light. front rank (b) reaches the water before his com-rades in rank with him, and since he is retardedbefore they are, they gain on him, and the directionof the front of the column is altered. The samemay be said of all the succeeding ranks, and it SIMPLEST…
Lenses
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