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.)
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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.)
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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,
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19TH AND BROWN STS., PHILADELPHIA, U.S.A.
* * * * *
PHYSIOLOGIC OPTICS
Ocular Dioptrics--Functions of the Retina--Ocular Movements and
Binocular Vision
BY DR. M. TSCHERNING
Adjunct-Director of the Laboratory of Ophthalmology at the Sorbonne,
Paris
AUTHORIZED TRANSLATION
BY CARL WEILAND, M.D.
Former Chief of Clinic in the Eye Department of the Jefferson College
Hospital, Philadelphia, Pa.
This is the crowning work on physiologic optics, and will mark a new era
in optical study. Its distinguished author is recognized in the world of
science as the greatest living authority on this subject, and his book
embodies not only his own researches, but those of the several hundred
investigators who, in the past hundred years, made the eye their
specialty and life study.
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,
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* * * * *
OPHTHALMIC LENSES
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.
This book of over 200 pages contains the following papers:
Ophthalmic Lenses.
Dioptric Formulæ for Combined Cylindrical Lenses.
The Prism-Dioptry.
A Metric System of Numbering and Measuring Prisms.
The Relation of the Prism-Dioptry to the Meter Angle.
The Relation of the Prism-Dioptry to the Lens-Dioptry.
The Perfected Prismometer.
The Prismometric Scale.
On the Practical Execution of Ophthalmic Prescriptions involving Prisms.
A Problem in Cemented Bi-Focal Lenses, Solved by the Prism-Dioptry.
Why Strong Contra-Generic Lenses of Equal Power Fail to Neutralize
Each Other.
The Advantages of the Sphero-Toric Lens.
The Iris, as Diaphragm and Photostat.
The Typoscope.
The Correction of Depleted Dynamic Refraction (Presbyopia).
_Press Notices on the Original Edition:_
OPHTHALMIC LENSES.
"The work stands alone, in its present form, a compendium of the various
laws of physics relative to this subject that are so difficult of access
in scattered treatises."--_New England Medical Gazette._
"It is the most complete and best illustrated book on this special
subject ever published."--_Horological Review_, New York.
"Of all the simple treatises on the properties of lenses that we have
seen, this is incomparably the best.... The teacher of the average
medical student will hail this little work as a great boon."--_Archives
of Ophthalmology, edited by H. Knapp, M.D._
DIOPTRIC FORMULÆ FOR COMBINED CYLINDRICAL LENSES.
"This little brochure solves the problem of combined cylinders in all
its aspects, and in a manner simple enough for the comprehension of the
average student of ophthalmology. The author is to be congratulated upon
the success that has crowned his labors, for nowhere is there to be
found so simple and yet so complete an explanation as is contained in
these pages."--_Archives of Ophthalmology, edited by H. Knapp, M.D._
"This exhaustive work of Mr. Prentice is a solution of one of the most
difficult problems in ophthalmological optics. Thanks are due to Mr.
Prentice for the excellent manner in which he has elucidated a subject
which has not hitherto been satisfactorily explained."--_The Ophthalmic
Review_, London.
The book contains 110 Original Diagrams. Bound in cloth.
Price, $1.50 (6s. 3d.)
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* * * * *
OPTOMETRIC RECORD BOOK
A record book, wherein to record optometric examinations, is an
indispensable adjunct of an optician's outfit.
The Keystone Optometric Record Book was specially prepared for this
purpose. It excels all others in being not only a record book, but an
invaluable guide in examination.
The book contains two hundred record forms with printed headings,
suggesting, in the proper order, the course of examination that should
be pursued to obtain most accurate results.
Each book has an index, which enables the optician to refer instantly to
the case of any particular patient.
The Keystone Record Book diminishes the time and labor required for
examinations, obviates possible oversights from carelessness and assures
a systematic and thorough examination of the eye, as well as furnishes a
permanent record of all examinations.
Sent postpaid on receipt of $1.00 (4s. 2d.)
PUBLISHED BY THE KEYSTONE,
THE ORGAN OF THE JEWELRY AND OPTICAL TRADES,
19TH & BROWN STS., PHILADELPHIA, U.S.A.
* * * * *
THE KEYSTONE BOOK OF MONOGRAMS
This book contains 2400 designs and over 6000 different combinations of
two and three letters.
Is an essential to every jeweler's outfit. It is not only necessary for
the jeweler's own use and guidance, but also to enable customers to
indicate exactly what they want, thus saving time and possible
dissatisfaction.
The Monograms are purposely left in outline, in order to show clearly
how the letters are intertwined or woven together. This permits such
enlargement or reduction of the Monogram as may be desired, and as much
shading, ornamentation and artistic finish as the jeweler may wish to
add.
This comprehensive compilation of Monograms is especially available as a
reference book in busy seasons. Its use saves time, thought and labor,
and ensures quick and satisfactory work.
Monograms are the fad of the time, and there's money for the jeweler in
Monogram engraving. The knowledge in this book can be turned into cash.
All the various styles of letters are illustrated.
Price, $1.00 (4s. 2d.)
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19TH & BROWN STS., PHILADELPHIA, U.S.A.
* * * * *
THE KEYSTONE RECORD BOOK OF WATCH REPAIRS
This book is 9 × 11 inches, has 120 pages, and space for recording
sixteen hundred jobs in detail. It is made of linen ledger paper, bound
in cloth with leather back and corners.
Price, $1.00 (4s. 2d.), prepaid.
No other record book on the market is so complete, and all cost more.
PUBLISHED BY THE KEYSTONE,
THE ORGAN OF THE JEWELRY AND OPTICAL TRADES,
19TH & BROWN STS., PHILADELPHIA, U.S.A.
* * * * *
THE KEYSTONE
BOOK OF GUARANTEES OF WATCH REPAIRS
This book contains two hundred printed guarantees, and is
handsomely bound. Each guarantee is 3¼ × 7½ inches, and
most carefully worded. Jewelers have discovered that the use
of these guarantees is a most effective way to secure and cultivate
public confidence. We sell a book of two hundred for
$1.00 (4s. 2d.), prepaid,
which is one-third less than the price charged by others for a
similar book.
PUBLISHED BY THE KEYSTONE,
THE ORGAN OF THE JEWELRY AND OPTICAL TRADES,
19TH & BROWN STS., PHILADELPHIA, U.S.A.