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 171
any calculation. This appli-cation of the instrument, though not mentioned byits inventor, makes it as useful to the surgeon asit is to the optician, and renders any descriptionof the analyser almost unnecessary, except for afew who may have had it constructed, or who wishgreat exactness with… … Fig. G3.—The Analyser. movable, marked exactly across the middle with atransverse line x. On either side of the slides is ANALYSIS OF SPECTACLES. 151 a millimetre scale with the zero in the centre. Thebroad slide has a long line w right across it oppositethe zero of its scale. The card r s has only…
Lenses
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