TRANSLATOR'S NOTE 



THE great importance of Professor Pauli's work on the 

 proteins is ample justification for an English translation of this 

 monograph, in which the work carried out by him and his 

 collaborators is summarised and presented in relation to 

 previous and concurrent research by other workers.' By the 

 application of the quantitative methods of physical and colloid 

 chemistry a consistent theory of the behaviour of proteins, 

 particularly in acid and alkaline solution, has been established. 



In the translation a number of typographical errors have 

 been corrected, a few slight alterations suggested by Professor 

 Pauli have been made, and the indexes have been added. 

 Otherwise no attempt has been made to do more than give the 

 substance of the original in English. 



The way of translators is hard : in this case it has been made 

 much easier by the constant advice of Mr. Emil Hatschek, 

 F.Inst.P., who has been good enough to read the whole of the 

 translation in manuscript. For this great advantage I wish 

 to record my gratitude to him. 



P. C. L. THORNE. 



SIR JOHN CASS TECHNICAL INSTITUTE, 

 LONDON. 



