Character of Growth with Pigs 359 



surpassing any other species of domestic animal. The 

 dry matter of the carcasses of individual animals has 

 been found to consist of over 80 per cent of fat, even 

 after the leaf -lard was removed, and the average pro- 

 portion in the dry substance of eight dressed pigs, rep- 

 resenting six breeds, was found by Wiley to be 78 per 

 cent. 



The statement of the composition of a Berkshire 

 pig and of a Duroc- Jersey will be found interesting in 

 this connection : 



Composition of the entire dressed animal, head, leaf -lard and 

 kidneys removed. Wiley. 



Weight Dry 



carcass Water substance Ash Protein Fat 



Ibs. % % % % % 



Berkshire 129 43.1 56.9 2.6 13. 40.5 



Duroc- Jersey 149 30.6 69.4 1.8 9. 57.7 



Fat pig, entire animal 



(Lawes& Gilbert).. 43.9 56.1 1.9 11.9 42.3 



It appears that there was stored in the part of the 

 animal analyzed by Wiley only 13 pounds of protein 

 with the Duroc -Jersey and about 17 pounds with the 

 Berkshire, the quantities of fat being 52 pounds and 

 86 pounds, respectively. The figures for the entire 

 animal, as analyzed by Lawes and Gilbert, are at the 

 rate of 23.8 pounds protein and 84.6 pounds fat, in a 

 pig weighing 200 pounds. 



These proportions bring out sharply the character 

 of the growth with swine. It is to be noted that in 

 no other species, very fat sheep possibly excepted, 

 does the body consist so largely of dry matter, which 

 means that the increase of a unit of live weight in- 



