Tscherning has sifted the gold of all optical research from the dross, and his book, as now published in English with many additions, is the most valuable mine of reliable optical knowledge within reach of ophthalmologists. It contains 380 pages and 212 illustrations, and its reference list comprises the entire galaxy of scientists who have made the century famous in the world of optics.
The chapters on Ophthalmometry, Ophthalmoscopy, Accommodation, Astigmatism, Aberration and Entoptic Phenomena, etc.—in fact, the entire book contains so much that is new, practical and necessary that no refractionist can afford to be without it.
Bound in Cloth. 380 Pages, 212 Illustrations.
Price, $3.50 (14s. 7d.)
Published by The Keystone,
the organ of the jewelry and optical trades,
19th & Brown Sts., Philadelphia, U.S.A.
Dioptric Formulæ for Combined Cylindrical Lenses, The Prism-Dioptry and Other Original Papers
By Charles F. Prentice, M.E.
A new and revised edition of all the original papers of this noted author, combined in one volume. In this revised form, with the addition of recent research, these standard papers are of increased value. Combined for the first time in one volume, they are the greatest compilation on the subject of lenses extant.