im 



NOEMAL MILK : ITS ADULTERATIONS, ETC. 



globulin, while lecithin, cholesterol, tyrosine, and urea are present. 

 Proteoses and peptones have been found. 



The sugars of colostruna consist of milk-sugar, dextrose, and, 

 possibly, other sugars. 



The fat differs from that of milk ; the melting point is high 

 (40° to 44° C), and the amount of volatile acids low. Pizzi found 

 that a few hours (3 to 6) before parturition the Reichert-Wollny 

 figure of the fat was 4'4 to 4'7, and six hours after calving 6"2, to 

 6'3 ; a rapid increase was noticed, and in from three to six days 

 a normal figure was reached. 



The ash of colostrum has, according to Fleischmann, the 

 following composition : — 



Potash, . 



Soda, 



Lime, 



Magnesia, 



Ferric oxide. 



Phosphoric anhydride. 



Sulphuric ,, 



Chlorine, 



Less oxygen equivalent to cMorine, 



Per cent 

 7 23 

 5-72 



34-85 

 2-06 

 0-52 



41-43 

 0-16 



11-25 



103-22 

 3-22 



100 00 



The best defined characteristic of colostrum is the presence of 

 the " corps granuleux " of Donne, which consist of clusters of 

 cells like bunches of grapes. These are from 0'005 to 0'025 milli- 

 metre in diameter, and are easily detected under the microscope. 

 They do not disappear entirely from milk till three weeks after 

 calving, according to Henle. 



The specific gravity of colostrum is from 1"046 to 1"079 at 

 1.5° C. (59° P.), and averages r068. 



Engling gives the following composition : — 



Change of Colostrum to Normal Milk. — The composition 

 of colostrum changes rapidly after parturition. Houdet gives 

 the following figures as illustrating the change : — 



