I'OLOSTRUM. 



163 



Fat. 



,, I Soluble 



Sugar. Proteins. 



Colloidal Calcium Othei' 

 Proteins. Phosphate Salts. 



Six days before calving, 

 Four „ „ 

 Immediately after „ 



Per it. 

 0-50 

 3-01 

 3-14 



Pel- ct. I Per ct. 

 2-35 ' 0-47 

 3-17 > 0-45 

 2-70 t 0-25 



These figures show a sudden increase in the amount of proteins 

 over that contained in the fluid secretion described above. 

 Houdet ascribes this to a diversion to the udder of nutritive 

 material which up to this time had been supplied to the fostus. 

 An increase of fat and a decrease of soluble proteins are also 

 observed. 



The colostrum from another cow was examined at intervals 

 after parturition with the following results (Table XXXII.), 

 which show the gradual transition into normal milk : — 



TABLE XXXII. — Change of Colostrum to Normal JIilk. 



Vaudiii nives the following figures (Table XXXIII.) as showing 

 the composition of colostrum : — 



TABLE XXXIII. — Composition of Colostrum. 



