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 147
one, called a bi-prism, had been used byFresnel to demonstrate the phenomena of interference. 126 PRISMS. two false images, clue to the fact, proved by Mr.Berry, that the edge of the obtuse prism is not amathematical line, but from imperfect manufacture,a rounded ridge. It was easy to deduce… … Fig. 5S.—The first form of the glass rod test. mounted in a metal disc. A convenient modifi-cation consists of a series of glass rods, placedparallel and in apposition, and united at their endsfby sealing wax. This form anyone can make forhimself by breaking up a thin glass rod into severalpieces…
Lenses
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