F THE JEWELRY AND OPTICAL TRADES,
19TH & BROWN STS., PHILADELPHIA, U.S.A.

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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.

[Illustration]

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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SKIASCOPY AND THE USE OF THE RETINOSCOPE

[Illustration]

A Treatise on the Shadow Test in its Practical Application to the Work
of Refraction, with an Explanation in Detail of the Optical Principles
on which the Science is Based.

This new work, the sale of which has already necessitated a second
edition, far excels all previous treatises on the subject in
comprehensiveness and practical value to the refractionist. It not only
explains the test, but expounds fully and explicitly the principles
underlying it--not only the phenomena revealed by the test, but the why
and wherefore of such phenomena.

It contains a full description of skiascopic apparatus, including the
latest and most approved instruments.

In depth of research, wealth of illustration and scientific completeness
this work is unique.

Bound in cloth; contains 231 pages and 73 illustrations and colored
plates.

Sent postpaid to any part of the world on receipt of $1.00 (4s. 2d.)

PUBLISHED BY THE KEYSTONE,