REVIEWS 
A text-book | of | Physiology | for | Medical Students and Physicians | by | 
William H. Howell, Ph. D., M. D., Se. D., LL. D. | Professor of 
physiology in the Johns Hopkins University, Baltimore | seventh edi- 
tion, thoroughly revised | Philadelphia and London | W. B. Saunders 
Company | 1918. Cloth, pp. 1-1059 + 1-18. 307 illustrations. $5 net. 
PREFACE TO THE SEVENTH EDITION 
In this, as in former editions, no fundamental change has 
been made in the contents, arrangement of material, or the gen- 
eral principles of presentation which were originally adopted. 
But in the three years that have elapsed since the sixth edition 
the natural expansion of physiological and medical research has 
yielded much new information. To incorporate the main fea- 
tures of this added knowledge it has been necessary to make 
many alterations. Throughout the work additions, substitu- 
tions, and omissions have been used freely in order to bring the 
book up to date as nearly as possible. 
It is now thirteen years since the first edition appeared. 
During this period the author has tried faithfully in the succes- 
sive editions to keep the book in line with our advancing know- 
ledge. It is not probable that he has been wholly successful in 
these attempts, for the literature bearing upon the subject has 
increased steadily in volume and complexity, but certainly he 
has not altogether failed. The book has moved with the cur- 
rent of contemporary physiological thought, as a text-book must . 
if it is to be useful to its clientele of students. 
Pathological | Technique | A Practical Manual for Workers in | Pathological 
Histology and Bacteriology | including | Directions for the Perform- 
ance of Autopsies and | for Clinical Diagnosis by Laboratory 
Methods | by | Frank Burr Mallory, A. M., M. D. | associate professor 
of Pathology, Harvard Medical School; pathologist | to the Boston | 
City Hospital | and | James Homer Wright, A. M., M. D., S. D. | 
pathologist to the Massachusetts General Hospital; assistant profes- 
sor of | pathology, Harvard Medical School | seventh edition | revised 
and enlarged | with 181 Illustrations | Philadelphia and London | W. 
B. Saunders Company | 1918. | pp. 1-55. 
PREFACE TO THE SEVENTH EDITION 
The book has been rearranged in this edition with the object 
of making it more useful. Among other changes the post- 
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