Dr. Lyon Playfaii* on the Milk of the CoWi M 



The butter, as we might have expected, is in larger pro- 

 portion than in the previous analysis. The amount of casein 

 is smaller. 



We shall defer the consideration of the causes which pro- 

 duce a variation in the quantities of the latter constituent. 



2nd day. The object of this day's experiment was to disco- 

 ver whether an increase of butter would be procured by 

 feeding the cow with after-grass in the stall. It refused, how- 

 ever, to eat this food, and being removed from its companions, 

 struggled for several hours to regain its liberty. To render 

 it tranquil, a companion was introduced into the same stall, 

 and it was then induced to consume 28 lbs. of good hay and 



•ed 3| 



22-684 100-0 



The milk of the morning amounted to 4 quarts ; but, owing 

 to an accident, was not analysed. 



3rd day. — A. The cow was kept in the shed, and consumed 

 28 lbs. of hay, 2| lbs. of oatmeal, and 8 lbs. of bean-flour. 

 The milk of the evening amounted to 4 quarts = 10*34 lbs. 

 Specific gravity, 1034. 

 23*160 grammes gave — In 100 parts. 



Casein . . . 1-262 5-4 



Butter . . . 0-905 3-9 



Sugar of milk 1-112 4-8 



Ashes . . . 0-136 0-5 



Water . . . 19-745 85-4 



23-160 100-0 

 B. The quantity of milk obtained in the morning amounted 

 to 41 quarts = 11*61 lbs. 



Specific gravity, 1032. 

 1 9-445 grammes of milk gave— In 10 o parts. 



Casein . . . 0'758 3-9 



Butter . . . 0-888 4-6 



Sugar . . . 0-877 4-5 



Ashes . . . 0-129 0*7 



Water . . . 16*793 86-3 



19-445 100*0 



