^Ew York Agricultural Experiment Station. 325 



precipitated casein was filtered out and the filtrate was dialyzed. This 

 solution contained di-calcium caseinate. The solution was divided, 

 one portion being used for the preparation of the di-calcium caseinate 

 and the other for the mono-calcium caseinate. 



In completing the preparation of the di-calcium caseinate, the 

 salt was precipitated by addition of acid-free alcohol, the precipitate 

 being washed with acid-free alcohol and ether, and then dried at 

 120° C. The composition of this preparation is given in Table IX. 



In preparing the mono-calcium caseinate, the solution of 

 di-calcium caseinate was treated with enough acid to precipitate 

 three-fourths of the casein. The resulting precipitate was filtered, 

 washed with water, acid-free alcohol and ether and then dried at 

 120° C. The results in Table VIII show the amount of calcium 

 found in the preparation. 



Table VIII. — Composition of Mono-Calcium Caseinate Preparation. 



Table IX. — Composition of Di-Calcium Caseinate Preparation. 



If we compare the results given in Tables VIII and IX with the 

 figures given in paragraphs (1), (2), (3) and (4) on page 323, it is 

 obvious that the results embodied in these tables are lower. The 

 higher results are obtained by the volumetric method and are believed 



