REVIEWS 
An International System | of | Ophthalmic Practice | edited by | Walter 
L. Pyle, A. M., M. D., Philadelphia | member of the American 
Ophthalmological Society | Ophthalmic Semiology and | Diagnosis | 
by | Charles H. Beard, M. D. | surgeon to the Illinois Charitable 
Eye and Ear Infirmary (eye | department) [etc., 5 lines] | with 
thirteen colored plates and seventy-one | figures in the text | Phila- 
delphia | P. Blakiston’s Son & Co. | 1012 Walnut Street | 1913 | 
Cloth, pp. i-xii+ 1-400. 
In his preface the author invites attention to the fact that 
there is no other separate volume, in any language, devoted 
exclusively to differential ocular semiology. In filling this want, 
the author has succeeded most admirably. The descriptions 
are full, accurate, and what is rarely encountered in medical 
literature, readable, while the illustrations, particularly the 
colored ones, render the recognition of lesions of the fundus 
a comparatively simple matter. Another point in which this 
work is worthy of special commendation is the excellent press 
work and the large type which render it really a pleasure to 
pick up for an evening’s reading. One might wish in this con- 
nection, however, that there were an omission of the annoying 
method of emphasizing words and phrases by the use of heavy- 
face type. 
W. H. ALLEN. 
A Laboratory Manual and Text-book | of Embryology | by | Charles William 
Prentiss, A. M., Ph. D. | Professor of Microscopic Anatomy in the 
Northwestern University Medical School, Chicago | with 360 illustra- 
tions | many of them in colors | Philadelphia and London | W. B. 
Saunders Company | 1915 | Cloth, pp. 1-400. Price, $3.50. 
This book represents the latest work on vertebrata embryol- 
ogy and is especially designed for medical students. The scope 
of the book includes the study of the chick and the pig, with a 
'short chapter on human embryology. Special comment should 
be made on the excellent printing of the reading matter, as well 
as the illustrations, which are all splendidly reproduced. 
Of particular interest is the chapter on the dissection of the 
pig embryo. The author here is introducing a new method for 
the study of the embryonic structures and relations in embryos 
over 5 or 6 millimeters in length. This will undoubtedly prove 
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