OIL OF THE BUTTER. 407 



The 13 quarts of milk yielded of butter, .... 13.60 

 Deduct for moisture, &c., 1 / 2.28 



11.32 

 Butter in the skimmed milk estimated as 68 



12.00 oz. 

 12 ounces of pure oil in the butter are | Ib. =* . . .75 



The oil in the food, 59 



The starch and sugar, 12.94 



Used for animal respiration. 8.58 



4.36 



There appears, then, in this supply of food, .59 Ibs. oil 

 and 4.36 Ibs. starch for the production of .75 in the 

 butter from 13 quarts per day, the cow's greatest yield. 

 At the time the milk was tested, aftermath hay was sub- 

 stituted for first-crop hay, in equal quantity. This, it 

 will be observed, is decidedly richer in oil. Her prod- 

 uce had lessened to 10 quarts per day ; her production 

 of butter was 10.50 oz. per day, or of pure oil about 9 

 oz. ; for the supply of oil the aftermath hay alone would 

 be much more than adequate. 



On examining the adequacy of the food for the sup- 

 ply of albumen for the caseine, 



Ibs. 



I find this to be, 3.08 



I assume that in 120 Ibs. of turnips, as required for 



maintenance, in a normal state, 1.98 



1.10 



Which, according to Haidlen's analysis, will be adequate 

 to the supply of 8.60 quarts per day. The supply of 

 mineral substances is in excess. 



The cow, under this treatment, gave, 



Soon after calving, fully 13 quarts per day. 



Five weeks after calving, 11 " " " 



In less than 8 weeks after calving, . . 9 " " " 



And with this there occurred also a loss of weight. 

 We find this cow supplied with food amply rich in 



