PEBFACE. 



IN view of the results attained from the course given 

 in physiological chemistry in this University, as well as 

 the experience of others, the author is firmly convinced of 

 the superiority of the laboratory method of instruction 

 over the didactic, believing that it is only by practical work 

 that the student can become familiar with the physio- 

 logical changes in progress in the animal body and their 

 products. This book has been prepared with the aim of 

 imparting accurate knowledge through the student's own 

 observation. It has seemed advisable to include with the 

 directions for experimental work a brief explanation of 

 the facts observed, so as to call attention to their meaning; 

 or, at times, to state others which are important, but which 

 could not well be demonstrated in such a course as this. 

 Some acquaintance with general chemistry and with 

 chemical manipulation is presupposed." 



For the purpose of making the course flexible, the 

 less important experiments, or those which are not of 

 general interest, have been printed in smaller type. A 

 few blank pages have been inserted for additional notes 

 by the student. It has been found that the time usually 

 assigned to chemistry in one year of a medical course is 

 sufficient for the performance of most of the experi- 

 mental work. 



As far as possible, the work has been so arranged as 

 to require but a small stock of apparatus and reagents 



(v) 



