PREFACE TO THE THIRD EDITION. 



THE revision of this book herewith presented is due to the 

 need for certain changes and additions to bring it up to the 

 state of information of the present year. It has no special 

 military significance because the principles involved in the 

 subject have changed little or none by developments in mili- 

 tary medicine. It was, however, inevitable that some new 

 matter with direct military applicability would have to be 

 introduced, but this is in the line of adaptation and not of 

 change in principles. 



Attempts have been made to increase the value of the 

 book to the nurse at the bedside by adding more details of 

 practice, at the same time elucidating the principles upon 

 which the practice is based so that it may be valuable to the 

 teacher. It is hoped that the information is presented in 

 such a manner that laymen may be interested and acquire 

 some knowledge of transmissible disease. 



The author wishes to express his appreciation of the 

 kindly interest and assistance given him by the publishers, 

 Messrs. Lea & Febiger, during the history of this book. 



H. F. 



CAMP ZACHARY TAYLOR, 

 1918. 



(v) 



