SALTS 



19 



iodine (brown), and the xantho proteic reaction. On hydrolysis 

 with hydrochloric acid it yields a quantity of a substance capa- 

 ble of reducing Fehling's copper solution. 



This proteid is probably identical with the j3 casein of 

 Strewe who separated it from a casein (caseinogen) by dissolving 

 out the latter with ammonium hydrate. 



Salts. In addition to the various acids and bases which 

 form part of the caseinogen complex, the senmi cf milk contains 

 various salts in solution. The average percentage of ash in 

 milk is about 0.75 per cent but fluctuates considerably. The 

 average composition of the ash of milk, as obtained by igni- 

 tion is given in Table V. 



Table V 

 COMPOSITION OF ASH OF MILK (Richmond) 



Lime 



Magnesia 



Potash 



Soda 



Phosphoric acid . 



Chlorine 



Carbon dioxide. . 

 Sulphuric acid . . 

 Ferric oxide 



Less oxygen = CI 



Per Cent. 



100.00 



Distribution of the phosphoric acid. 



Grama per 100 c.cma. 



P2O6 as caseinogen combined with NaCa . 0605 



PaOs as CajPzOg 0.0625 



P2O5 as R3HPO1 0.0770 



P2O6 as RH2PO4 0.0200 



Total 0.2200 



