106 



THE CHEMISTRY OF THE FARM 



*'yolk " of unwashed wool, and in the sweat of horses. 

 Blood, on the other hand, always contains a prepon- 

 derance of sodium salts. 



The amounts of water, nitrogenous matter, fat, and 

 ash constituents present in a large number of animals 

 have been determined at Eothamsted. The following 

 table shows the percentage composition of eight 

 animals, after deducting the contents of the stomachs 

 and intestines. The fat pig was one grown for fresh 

 pork, not for bacon. 



PERCENTAGE COMPOSITION OF BUTCHER'S CARCASE. 



Water is in nearly every case the largest ingredient 

 of the animal body. The proportion of water is 



