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Start Over Formats Text ✖Remove constraint Formats: Text Subjects Eyeglasses ✖Remove constraint Subjects: Eyeglasses Titles A treatise on simple and compound ophthalmic lenses: their refraction and dioptric formulae, including tables of crossed cylinders and their sphero-cylindrical equivalents ✖Remove constraint Titles: A treatise on simple and compound ophthalmic lenses: their refraction and dioptric formulae, including tables of crossed cylinders and their sphero-cylindrical equivalents Publication Year 1886 ✖Remove constraint Publication Year: 1886

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  • A treatise on simple and compound ophthalmic lenses: their refraction and dioptric formulae, including tables of crossed cylinders and their sphero-cylindrical equivalents1