170 



THE FEEDING OF ANIMALS 



the percentage of metabolizable energy, or in other words, 

 that which may be applied to use by the animal, from the 

 several materials involved in the experiments: 



Table XXXII. 



It will be noted that the main loss is by way of the 

 undigested food residue. The energy loss in the urine 

 ranged from 3.3 to 7.2 per cent. The loss from methane 

 ranged from 5.9 to 9.7 per cent of the total dry matter, 

 or from 4.2 to 5.1 grams to 100 grams of digestible car- 

 bohydrates, the average being 4.8 grams. Kellner found 

 4.2 grams, and these figures may be taken as a basis for 

 the estimate of the probable loss of chemical energy 

 through fermentations. The imdigested residue varies 

 greatly according to the nature of the food. These authors 

 have investigated the influence of the quantity of the 

 ration upon the losses of chemical energy. 



