CHEMICAL COMPOSITION OF PROTEIN MOLECULE 19 



advisable to combine the processes, since the phosphotungstic acid 

 precipitation does not effect a perfect separation of the two groups. 

 A very large number of proteins have now been hydro lysed and the 

 products of hydrolysis determined by these methods by investigators 

 not only in Germany, but also in France and America. The results 

 are collected together in the following tables which are arranged ac- 

 cording to the classification of the proteins. 



PROTAMINES. 



