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Start Over Subjects Optical Phenomena ✖Remove constraint Subjects: Optical Phenomena Titles Skiascopy: a treatise on the shadow test in its practical application to the work of refraction : with an explanation in detail of the optical principles on which the science is based ✖Remove constraint Titles: Skiascopy: a treatise on the shadow test in its practical application to the work of refraction : with an explanation in detail of the optical principles on which the science is based Dates by Range 1850-1899 ✖Remove constraint Dates by Range: 1850-1899

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  • Skiascopy: a treatise on the shadow test in its practical application to the work of refraction : with an explanation in detail of the optical principles on which the science is based1