322 TiEPORT OF THE DePART.MK.XT OF C'jIE.MlSTRV OF THE 



preliminary test. An amount of acid less than that required to 

 produce a precipitate in this second test was then added to all the 

 tubes and the contents again dialyzed. This operation was con- 

 tinued in the manner indicated in the following table: 



Table VI. — Illustration of Method Used in Preparing Acid Caseinates op 



Calcium, Strontium and Barium. 



In the manner described above, we have made numerous prepara- 

 tions of calcium, strontium and barium caseinates; the averages of 

 many results are given in Table VII. 



We have found that in adding It HCl to 50 cc. of a caseinate 



'^O .")U 



solution containing 1 gram of casein dissolved in 50 cc. of j^ solution 

 of hydroxide of calcium, strontium or barium, it requires less than 



