73 



THE CHEMISTRY OF THE FARM. 



of comparison each animal is assumed to weigh 1000 Ibs. 

 The table also gives the nitrogen and ash constituents in 

 wool and milk ; it thus supplies full information as to the 

 loss which a farm will sustain by the sale of animal pro- 

 duce. The composition of wool is deduced from foreign 

 analyses. 



ASH CONSTITUENTS AND NITROGEN IN 1000 POUNDS OF 

 VARIOUS ANIMALS AND THEIR PRODUCTS.* 



* The constituents of animals are reckoned in this table on a fasted 

 live weight including contents of stomachs and intestines. 



These figures show that the ox contains in proportion 

 to its weight a larger amount of nitrogen, and a much 

 larger amount of phosphoric acid and lime, than either the 

 sheep or pig. Of all the animals raised on a farm the 

 pig contains least of all the important ash constituents. 



The large amount of potash in unwashed wool is very 

 remarkable ; a fleece must sometimes contain more potash 

 than the whole body of the shorn sheep. 



If we assume a cow to yield 600 gallons of milk in the 

 year, and the milk to be sold, the loss to the farm will be 

 about 3(5 Ibs. of nitrogen, 12 Ibs. of phosphoric acid, and 

 10 Ibs. of potash. If the milk is made into cheese the 



