I.
BY C.H. BROWN, M.D.
Graduate University of Pennsylvania; Professor of Optics and Refraction;
formerly Physician in Philadelphia Hospital; Member of Philadelphia
County, Pennsylvania State and American Medical Societies.
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The Optician's Manual, Vol. I., has proved to be the most popular work
on practical refraction ever published. The knowledge it contains has
been more effective in building up the optical profession than any other
educational factor. A study of it is essential to an intelligent
appreciation of Vol. II., for it lays the foundation structure of all
optical knowledge, as the titles of its ten chapters show:
Chapter I.--Introductory Remarks.
Chapter II.--The Eye Anatomically.
Chapter III.--The Eye Optically; or, The Physiology of Vision.
Chapter IV.--Optics.
Chapter V.--Lenses.
Chapter VI.--Numbering of Lenses.
Chapter VII.--The Use and Value of Glasses.
Chapter VIII.--Outfit Required.
Chapter IX.
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