MINERAL CONSTITUENTS OF ANIMALS 



17 



the chemical composition of the mineral matter. It was 

 with this object that Lawes and Gilbert determined 

 the actual chemical constituents in the animal body, 

 the results of which are given in the following- 

 table : 



Table showing Ash Constituents and Nitrogen in 1000 Ibs. of 

 Farm Animals (Fatted Live Weight], Wool, and Milk. 



The above table shows that the half- fat ox per 1000 

 Ibs. fasted live weight has removed from its food, and 

 indirectly from the soil, an amount of minerals which 

 would be supplied by 166 Ibs. pure nitrate of soda, 133 

 Ibs. superphosphate of lime (30 per cent, soluble), 

 nearly 4 Ibs. pure sulphate of potash, 26^ Ibs. ground 

 lime (80 per cent, pure), and nearly 2 IDS. carbonate 

 of magnesia. These figures show that where young 

 growing animals are living largely on pasture land, 



B 



