286 Dr. Lyon Playfair on the Milk of the Cow. 



4th day. — A. The cow, kept in the stall as before, received 

 this day 24 lbs. of potatoes (steamed), 14 lbs. of hay, and 8 lbs. 

 of bean-flour. She gave in the evening 5 quarts of milk 

 = 12-9 lbs. 



Specific gravity, 1033. 



17*820 grammes of milk gave — in 100 parts. 



Casein . . . 0*707 3-9 



Butter . . . 1*190 6*7 



Sugar of milk 0*815 4*6 



Ashes . . . 0*104 0*6 



Water . . . 15-004 84-2 



17-820 100*0 



B. The milk of the morning amounted to 4 quarts 

 = 10-32 lbs. 



Specific gravity, 1032. 

 19*641 grammes of milk yielded — In 100 parts. 

 Casein . . . 0-535 2*7 



Butter . . . 0-978 4*9 



Sugar of milk 0-991 5*0 



Ashes . . . 0-116 0-5 



Water . . . 17-021 86-9 



19-641 100-0 



5th day. — A. The cow, kept as before, consumed 14 lbs. of 

 hay and 30 lbs. of potatoes (steamed). She gave in the even- 

 ing 5^ quarts of milk = 13' 18 lbs. 



Specific gravity, 1030. 

 18*141 grammes of milk yielded — in 100 parts. 

 Casein . . ., 0'716 3-9 



Butter . . . 0-845 4-6 



Sugar of milk 0-713 3-9 



Ashes . . . 0-099 0-5 



Water. . . 15-768 87*1 



quarts 



16-740 100-0 



Before proceeding to the consideration of these experi- 



