88 MANtlAL OT CATTLE-S^EEBING. 



tity wliicli is formed daily in tlie body of a fattening steer 

 may amount to a pound or more. 



The nitrogen contained in 100 parts of water-free pro- 

 tein can be separated from it in tlie form of 33.6 parts of 

 urea. The remainder of the protein, 66.5 parts, after 

 taking up and uniting with 12.3 parts of water, contains 

 the elements for the formation of 51.4 parts of fat and 

 27 A parts of carbonic acid. 



The fat, whether formed from the albuminoids or con- 

 tained as such in the food, is, according to circumstances, 

 either deposited in tlie body of the animal, finds appli- 

 cation in the production of milk, or undergoes a complete 

 oxidation in the respiratory process, yielding caibonic acid 

 and watei'. The fat producible from the albuminoids must 

 always be added to that which is contained, ready foi^med, 

 in the fodder and resorbed from the digestive apparatus, 

 in estimating the results of a paiticular method of feed- 

 ii)g. It is, however, to be observed that, according to the 

 results of late researches, the fat formed in the body out 

 of albuminoids appears to unite more readily with oxygen 

 — that is, to burn easier — than the ready formed fat taken 

 in the food, and this again easier than that which is already 

 deposited in the fat-tissues. 



The carikydrates are represented in the body chiefly by 

 sugar, all the other bodies of the group being converted 

 into this substance during digestion, so far as they are not 

 further decomposed. The food of' all herbivorous animals 

 contains large quantities of carbhydrates, an ox, for ex- 

 ample, often resorbing into his blood from twelve to 

 eighteen pounds of sugar in twenty-four hours, yet the 

 blood, in its normal state, never contains more than minute 

 traces of this substance, and it is never stored up as such 

 in the body. 



