iv Preface. 



the why and the how so far as possible. His obedience 

 will be more ready and more complete when based on 

 intelligence than when it is simply a submission to a 

 peremptory command. In many cases, too, the general 

 principle will serve as a guide where no rule has been laid 

 down ; no treatise can cover all possible contingencies. 



The subject of alcohol has been treated very thoroughly 

 and in full compliance with the laws of the various states. 

 Throughout the book the effects of alcohol and other nar- 

 cotics have been discussed in close connection with the 

 accounts of the functions of the organs of the body. A 

 number of authoritative quotations have been made, so 

 that the pupil may know that the statements made are 

 supported by the most eminent authorities of the world on 

 these subjects. 



The author's larger work, " Physiology, Experimental 

 and Descriptive," was criticised and corrected by a large 

 number of eminent authorities, a list of whom is given in 

 the preface of that book. This book is a condensation, 

 though largely rewritten, of that work, and therefore 

 derives the full benefit of their criticism. 



At the end of the book is a glossary (page 300) in which 

 all technical terms are pronounced and explained. 



