PREFACH. 
THE general tendency of modern medicine is to divide the science 
into separate and distinct special branches. The literature of each 
specialty is so voluminous and is increasing at such a rate that a 
thorough treatment of even one of these subjects would expand the 
size of this book far beyond the limits which have been assigned. 
Therefore in compiling this little work, in which three specialties are 
discussed, the effort has been made simply to present the main facts 
of each subject in a concise manner to save time both for the student 
and the busy practitioner. It is not intended, however, to replace 
a more extended reading if one’s time permits. 
In the preparation of this volume I am indebted to the works of 
Delafield, Prudden, Schafer, Klein, Zeigler and Fraenkel, which have 
been freely drawn upon. 
BENNETT 8. BEACH, M. D. 
210 West Thirty-fourth st., } 
New York, 
October, 1892. 
