Prentice, Charles F. (Charles Frederick), 1854- author. Dioptric formulae for combined cylindrical lenses applicable for all angular deviations of their axes / by Chas. F. Prentice.

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Prentice, Charles F. (Charles Frederick), 1854- author.

Dioptric formulae for combined cylindrical lenses applicable for all angular deviations of their axes / by Chas. F. Prentice.

Eyeglasses.

Refraction, Ocular.

Lenses.