On the Composition of Milk 



127 



The solid matters in their morning's milk, amounted to 13-46 

 per cent., and in their evening's milk, to 14"12 per cent. 



Five of the cows were giving milk for four months. Their 

 yield was, on the average, ten and a half quarts daily. The total 

 solids in the morning's milk amounted to 12*196 per cent,, and in 

 the evening's milk to 13 '4 5 6. 



In the following table, the amount of solids in each case is 

 shown : — 



CovTS giTing Milk. 



Less than one month, 

 During from one to t-wo month*, 

 During four months, .... 

 During eight to ten months inclusive, 



Quarts 

 yielded 

 per day. 



13 

 101 



6i 



Ppt cent, of 



Solids in 



Morning's 



Milk. 



12-700 

 13-460 

 12-196 

 13-570 



Per cent, of 



Solids in 



Evening's 



Milk. 



13-210 

 14-120 

 13-456 

 13-960 



Difference between the Quantities Yielded Morning and 



Evening, 

 In every instance, the quantity of milk yielded in the morning 

 exceeded the proportion furnished in the evening. In two 

 instances, the morning's supply was three times more abundant, 

 and in very many cases twice as plentiful. About eight hours 

 intervened between the milkincrs. 



Superiority of the Evening's Milk. 

 Thirty out of the forty-two cows gave richer milk in the 

 evening than in the morning, and eleven cows gave richer milk 

 in the morning than in the evening, whilst the remaining cow's 

 milk was equally good at both milkings. The average amount 

 of solids in the morning's milk was 13*20, and in the evening's 

 13*74 — a difference of 0*54 per cent. The increase in the amount 

 of solid matters in the evening's milk was due chiefly to the larger 

 amount of fats contained in the latter. The amount was 4*22, or 

 0*4 per cent, over the proportion (3*82 per cent.) found in the 

 morning's milk. In the case of the mixed milk of forty-two cows, 

 that yielded in the evening was richer by '56 per cent, of solid 

 matters, including 0*44 per cent, of fats. 



SciEN. Proc, R.D.S. Vol. in., Pt. III. L2 



