ANIMAL CONSTITUENTS. 



79 



annual loss will be about 28 Ibs of nitrogen, 7 Ibs. of 

 phosphoric acid, and 1 Ib. of potash. If only butter is 

 sold the loss of nitrogen and ash constituents will be 

 quite insignificant. 



In a fat ox about 60 per cent, of the fasted live weight 

 will be butchers' carcase ; in a fat sheep about 58 per cent.; 

 in a fat pig (fatted for pork) 83 per cent. The proportion 

 of carcase increases considerably during fattening. Thus 

 the carcase in the store sheep killed at Rothamsted 

 averaged 53'4, in the fat sheep 58*6, and in the very fat 

 sheep 64*1 per cent, of the fasted live weight. 



When a lean animal is fattened the larger part of 

 the increase in live weight is carcase. It was found at 

 Eothamsted that in the case of sheep passing from the 

 tf store " to the " fat " condition, increasing in weight from 

 102 Ibs. to 155 Ibs., about 68 per cent, of the increase was 

 carcase. With " fat " sheep passing into the " very fat " 

 state, increasing from 144 Ibs. to 202 ibs. live weight, the 

 proportion of carcase in the increase was about 77 per cent. 

 With a fattening pig, increasing from 103 Ibs. to 191 Ibs. 

 live weight, the proportion of carcase in the increase was 

 found to be 91 per cent. 



The percentage composition of the increase of sheep 

 and pigs when passing from the "store " to the " fat" 

 condition is about as follows. The increase of fattening 

 oxen will have a similar composition. 



PERCENTAGE COMPOSITION OF THE INCREASE WHILST 

 FATTENING. 



