. The Canadian druggist. PATENTED Fitted with clear GLASS LENSES, or with colored lenses if the article for anyone exposed to the inclemency of the for our Catalogue on EYE SHADES, Eve Shields, and Auto Goggles. Manufactured by CHICAGO EYE SHIELD CO., 114 Randolph St. E., Chicago, III. THE KINDS THAT SELL. H. PLANTEN & SON ( Established1836 ) NEW YORK • ItttiieAr American Capsule Honne** WILL REMOVE May 1905 to NEW FACTORY93-95 Henry St , BROOKLYN, N. Y. CANADIAN DRUGGIST. 343 till laiijjo of iucoiiiiiiodalioii (all errors of rcfrac- Lujn hfinjf corrictid) iiiiist b
. The Canadian druggist. PATENTED Fitted with clear GLASS LENSES, or with colored lenses if the article for anyone exposed to the inclemency of the for our Catalogue on EYE SHADES, Eve Shields, and Auto Goggles. Manufactured by CHICAGO EYE SHIELD CO., 114 Randolph St. E., Chicago, III. THE KINDS THAT SELL. H. PLANTEN & SON ( Established1836 ) NEW YORK • ItttiieAr American Capsule Honne** WILL REMOVE May 1905 to NEW FACTORY93-95 Henry St , BROOKLYN, N. Y. CANADIAN DRUGGIST. 343 till laiijjo of iucoiiiiiiodalioii (all errors of rcfrac- Lujn hfinjf corrictid) iiiiist be kept in reserve. For instance: An eiiiiiulrci|ie, a;^e<l 50, lias 2D. of accoiiiiiiodalion. Io read eoinfortably at 3 I). ( 13 inches) he is laekin}^ one (lio])ter, lo uhieii we iinisl add 1-3 of 2 D., or I)., luakinf^ Jijs reading lens )- D. If a patient of the same ajje has D. of luperopia, we, of course, add Ihis aniounl to the lens just found, inakiu}^ the lens t D., or jiractically t D., or • ,•25 D. Io expedite this process ol vselection Dr. Malon has worked out a siiiii)le formula, thus—analvti- cally it is, where \i = the i)unctum proximum, and 1 the lens to be added for jiresbyopia : (3-p) \i+ ^= 1. i~hat is, the dilTercnce between the3 readinjj point in diopters, 3 I)., and
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdrugtrade, bookyear18
