IT PREFACE 



The student requires a work which, explains ; it is for 

 this reason that I wrote this work in questions and answers. 

 Depending on the importance of the subject from a practical 

 standpoint, a more or l6ss exhaustive discussion has been 

 indulged in, exemplified by every-day cases. 



Occasionally the therapeutic part of this work has become, 

 a little more extensive than probably permissible in a work 

 on the Principles of Surgery. The only apology which I offer, 

 if such is necessary, consists in the desire to supply the stu- 

 dent with certain reliable facts which he cannot find in print 

 elsewhere. 



In arranging and classifying the various subjects, I fol- 

 lowed Prof. Dr. Eug. Frohner's masterly exhibition on. 

 General Surgery, which Prof. Frohner kindly permitted m& 

 to do and for which I herewith extend my best thanks. 



Illustrations are omitted, as the clinic, the histological,, 

 pathological and anatomical laboratories should supply thft 

 student with the real thing. 



W. E. A. Wyman. 



