TRANSLATOR'S PREFACE. 



KNOWING the demands of the medical student and practising 

 physician for a more extended knowledge of physiological chem- 

 istry, and at the same time knowing the lack of literature on 

 this subject in the English language, I have been led to make a 

 translation of this most admirable work. The subject of physiological 

 chemistry is being more and more advanced in this country, until it 

 will soon become an obligatory study in our medical schools, and 

 the enlargement of the literature on the subject will greatly help its 

 progress. 



It will be seen at a glance that the work is well suited as a 

 laboratory book, for it contains the best methods for the prepara- 

 tion, detection, and quantitative estimation of most of the substances 

 found in the organism and its excretions and secretions. At the 

 author's request I have made no additions or changes whatsoever in 

 the manuscript, and it may appear that some of the methods de- 

 scribed, especially on the urine, are too lengthy and troublesome 

 for the practising physician; still the quick or clinical methods are 

 well described in smaller hand-books on the subject. In the work 

 of translation I have adhered as closely as possible to the author's 

 enlarged German edition and also the original Swedish edition, 

 and therefore the literary errors will perhaps be pardoned. 



I must here express my appreciation to Mon. A. BOUKGOUGNON 

 who has kindly gone carefully over the manuscript and read the 

 proof-sheets. 



NEW YORK, October, 1893. 



