PHOSPHORUS FROM CASEINOGEN. 



44.8 



1 2 hours, in which time the precipitate had settled, a clear liquid was 

 obtained on filtration ; in a measured volume of this the phosphoric acid 

 was estimated. The quantities so obtained were calculated out for the 

 whole sample taken, so that the fraction of the soluble P 2 O 5 split off 

 might be readily seen when compared with the total P 2 O 5 which was 

 estimated in a separate sample, generally 10 c.c., not precipitated by 

 tannic acid. The following experiments were carried out : 



In Experiments 1, 2, 3, only the soluble P 2 5 in the early stages of 

 digestion was determined. From the data it will be seen that of the 

 total P 2 S passes into solution in 6 hours ; this value becomes f in 24 

 hours, and f after 6 days. The accompanying curve shows that this 

 soluble P 2 O 5 is split off in a similar way to that of the soluble nitrogen 



