Digest k 



153 



The gases of the large intestine in the horse contain, 

 according to Planer, 50 per cent, of carburetted hydrogen, 

 42 per cent, of nitrogen, and 8 per cent, of carbonic acid. 



Tappeiner, quoted by Ellenberger, gives the following 

 analysis of intestinal gases in the horse : 



Small Intestines (Hay Diet). 



Oxygen - 

 Marsh-gas 



1700 



40-0 



The Faeces. 



The freces consist of that portion of the food which is 

 indigestible, together with that part which though diges- 

 tible has escaped absorption. Mixed with these we have 

 water, colouring substances, mucin, and other organic 

 matters, inorganic salts, bile pigment, volatile fatty acids, 

 remains of digestive fluids, organisms, etc. 



The composition of the fasces depends largely on the 

 diet. The following table from Gamgee * can only give a 

 general idea of their nature : 



* ' Our Domestic Animals in Health and Disease,' p. 253. 



