1052, BLOOD, MILK, URINE. 



Chloride of sodium. 



potassium. 



Carbonates 1 V 8.370 7.304 



Phosphates > of potash and soda. 



Sulphates J 



Carbonates of lime and magnesia. .1 



Phosphates of lime, magnesia, and iron. I 2.100 1.414 



Peroxide of iron. . . .J 



Loss. ..... 2.400 2.586 



100.000 100.000 



Milk. The history of this fluid has been partly given under 

 its characteristic constituents casein, milk-sugar, and the acids 

 of butter. It contains from 10 to 13 per cent of solid matter, 

 the rest is water. It is not coagulated by heat, but readily by 

 all sour liquids and by rennet. When heated, a skin of coagu- 

 lated casein forms on its surface. The butter of milk consists 

 of margarine, oleine and butyrine (page 954). 



Milk may be made to undergo the vinous fermentation, 

 although very slowly, and only after it contains lactic acid ; 

 which acid probably converts the milk-sugar into grape-sugar 

 before the fermentation occurs. 



An excellent examination has been made by MM. O. Henry 

 and A. Chevallier, of the comparative composition of woman's 

 milk, the milk of the cow and ass, of which I subjoin the results. 

 (Journal de Pharmacie XXV. 333 et 401. 



ORDINARY MILK. 



Woman. Ass. Cow. 



Cheese. . 1.52 1.82 4.48 



Butter. . . 3.55 0.11 3.13 



Sugar of milk. . 6.50 6.08 4.77 

 Salts (or mucous 



matter). . . 0.45 0.34 0.60 



Water. . 87.98 91.65 87.02 



100.00 100.00 100.00 



Urine. This fluid is secreted by the kidneys from the arte- 

 rial blood. The average density of healthy human urine is 



