250 



THE FEEDING EXPERIMENTS 



on an unlimited supply of barley meal together with a fixed 

 ration of 1 lb. per head of pea meal per diem. 



V. THE COMPOSITION OF OXEN, SHEEP, AND PIGS, AND OF 

 THEIR INCREASE DURING FATTENING. 



The most important work carried out at Rothamsted on 

 the nutrition of animals was the determination of the composition 

 of ten farm animals in different stages of growth and fattening. 



Fat 

 Calf. 



Half-fat 

 Ox. 



Fat 

 Ox. 



Mineral Matter X 



Fat Store Half-fat Fat Very fat 

 Lamb. Sheep. Sheep. Sheep. Sheep. 



NitrojjenousSubstance 



Store 



| Fat* | 1 Water* 



FIG. 48. Percentage Composition of the Whole Bodies of Oxen, Sheep, and Pigs. 



For this purpose the following animals were selected a fat 

 calf, a half-fat and a fat ox; a fat lamb, a store sheep, three 

 others in the half-fat, fat, and very fat condition ; a store and a 

 fat pig. These animals after slaughter were carefully divided, 

 and the weights of the carcass and different parts of the offal 

 were determined. Afterwards the proportions of water, fat, 

 nitrogen, and ash in each part were determined, the composition 

 of the ash of each part being determined later. A summary of 

 the results is set out in Table XCL, while the diagram (Fig. 

 48) shows graphically the composition of the entire animals. 



