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This eBook from the Gutenberg Project consists of approximately 202 pages of information about Watch and Clock Escapements.

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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.—­Method of Examination. 
  Chapter X.—­Presbyopia.

The Optician’s Manual, Vol.  I., is complete in itself, and has been the entire optical education of many successful opticians.  For student and teacher it is the best treatise of its kind, being simple in style, accurate in statement and comprehensive in its treatment of refractive procedure and problems.  It merits the place of honor beside Vol.  II. 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 OPTICIAN’S MANUAL

VOL.  II.

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.  II., is a direct continuation of The Optician’s Manual, Vol.  I., being a much more advanced and comprehensive treatise.  It covers in minutest detail the four great subdivisions of practical eye refraction, viz: 

  Myopia. 
  Hypermetropia. 
  Astigmatism. 
  Muscular Anomalies.

It contains the most authoritative and complete researches up to date on these subjects, treated by the master hand of an eminent oculist and optical teacher.  It is thoroughly practical, explicit in statement and accurate as to fact.  All refractive errors and complications are clearly explained, and the methods of correction thoroughly elucidated.

This book fills the last great want in higher refractive optics, and the knowledge contained in it marks the standard of professionalism.

Bound in Cloth—­408 pages—­with 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.

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