REVIEWS. 
183 
There is one feature in this volume which we are particularly glad to see, 
namely, the short bibliographical summaries at the close of each section. 
Most elementary books seem to be written as if the authors thought that 
they had told everything that anybody could possibly want to know ; and 
many a student, after exhausting the limited supply of intellectual pabulum 
which they present to him, must have sighed in vain for some friendly guid- 
ance to those richer pastures in which perhaps his late teacher had gathered 
the materials for the insufficient banquet. Of course in a small work 
like the present, it would be unfair to expect a complete list of the works 
of reference to which the student should have recourse ; but our author 
has given a very judicious selection of them, and has even indicated in 
many cases where the more recent scattered papers of importance are to be 
found, even when he abstains from giving their titles. In every respect 
Dr. Nicholson’s little work will be found an excellent guide to an acquaint- 
ance with the subject of which it treats. The illustrations, a good many 
of which are new, are numerous and good, but we once more meet with 
our friend the mammoth with wooden feet. It is really hard upon this un- 
fortunate animal that he should be pictorially handed down to posterity in 
this condition. 
HISTOLOGICAL DEMONSTRATIONS.* 
I T is no great wonder that these u Histological Demonstrations ” have 
reached a second edition, for the book, which is founded upon the lec- 
tures of Dr. George Harley, edited by Professor G. T. Brown, is one of the 
most useful guides that the student could have in the practical study of 
microscopic anatomy. The first section of the book gives an account of the 
methods of investigation and the instruments employed, the structure and 
principles of the microscope, and the mode of preparation of the objects to 
be examined. The authors then describe the various tissues, and their 
combinations in the different organs of the animal body in a healthy 
state ; and from these they pass to that most important subject to the 
medical student — the investigation of the morbid conditions and products 
of different parts of the organism. The whole of this portion of the book 
seems to be very well done; it furnishes an excellent summary of the 
present state of knowledge, with clear directions to the student as to the 
best methods of seeing for himself what is here described. The concluding 
section of the book treats of the parasites of man and of some animals, and 
in the first portion of this at any rate the authors are not particularly suc- 
cessful, especially when they place the wingless dipterous parasite, Melo- 
phagus ounus , under their group u Ixoda ” because it is called a tick. The 
part relating to the Entozoa is more satisfactory, although rather scanty in 
its details. This book is very freely illustrated with woodcuts, which are 
for the most part good and characteristic. It has also a coloured frontis- 
piece, representing a section of the injected molar tooth of a cat. 
* u Histological Demonstrations : a Guide to the Microscopical Examination 
of the Animal Tissues in Health and Disease : being the substance of Lectures 
delivered by George Harley, M.D., F.R.S.” Edited by George T. Brown, 
M.R.C.V.S. Second Edition. 8vo. London : Longmans. 1876. 
