254 
REVIEWS. 
Clinical Lectures on the Principles and Practice of Medicine. 
By Joun Hucues Bennert, M.D., F.R.S.E. Edinburgh: 
Adami aiid Charles Black. 
A.tHovcH this is a second edition of a work well known, 
and its main purpose beyond the sphere of our criticism, we 
think it right to bring it before the notice of our readers, 
because it contains a large amount of matter bearing directly 
on microscopic research. Dr. Bennett is one of those teachers 
of medicine, who has, from an early period of his career, 
recognised the importance of conducting pathological re- 
searches by the aid of the microscope, “and in this work 
abundant evidence is afforded of the value and necessity of 
this instrument to the practitioner of medicine. In an early 
number of this Journal (volume I, page 223), we reviewed Dr. 
Bennett’s ‘ Introduction to Clinical Medicine, and recom- 
mended it to the notice of our medical readers, as conveying a 
just estimate of the value of the microscope in pathological re- 
search. In the present work the practieal application of this 
instrument to the various forms of disease in which it may be 
employed is fully brought out. In fact, with regard to a large 
number of the forms of disease no true theory of their 
nature can be formed independent of an investigation by the 
aid of the microscope. It is in the section devoted to the 
principles of medicine that Dr. Bennett handles the facts 
supplied by microscopic research in the most masterly 
manner. This section should be studied by all those who 
are anxious to understand the intimate causes engaged in the 
production of disease, and what are the changes which are 
necessary to the establishment of health. We should not 
pretend, even had we space here, to criticise Dr. Bennett’s 
theoretical or practical conclusions from the observations he 
records, but we draw attention to them, as showing the com- 
parative valuelessness of any observations or deductions on the 
intimate nature of organic disease without microscopic in- 
vestigation. 
We select two passages from this section of the work on 
exudation and degeneration, not on account of any novelty 
they present, but as illustrations of the manner in which the 
subject of pathology is treated. 
“Tubercular exudation has been spoken of as presenting a miliary infil- 
