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This is a neatly printed and abundantly illustrated little volume of 40 pages. The contents of the volume are well indicated in the above title, and the style of the author is simple, and his methods of illustration easily understood.
Treatise on Simple and Compound Ophthalmic Lenses; their Refraction and Dioptric Formulæ, including Tables of Crossed Cylinders and their Sphero-Cylindrical Equivalents. JAMA. 1887;IX(4):128. doi:10.1001/jama.1887.02400030032022
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