. in every optical library. Bound in Cloth—422 pages—colored plates and illustrations. Sent postpaid on receipt of $2.00 8s. 4d.) published by The Keystone, THE ORGAN OF THE JEWELRY AND OPTICAL TRADES, 19TH & Brown Sts., Philadelphia, U. S. A. THE OPTICIANS MANUAL VOL. II. By C. H. Brown, M. D.… … The Opticians Manual, Vol. II., isa direct continuation of The OpticiansManual, Vol. I., being a much moreadvanced and comprehensive treatise.It covers in minutest detail the fouigreat subdivisions of practical eye refrac-tion, viz : Myopia.Hypermetropia.Astigmatism.Muscular Anomalies. It contains…
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