MANUAL OF CATTLE-FEEDING. 381 



Btal)les. Doubtless some saving of protein and a consider- 

 able economy of carbliydratete and fat can be effected in 

 this way. 



In the second place, the digestible matters of the corn- 

 meal are accompanied by far less indigestible matter, and 

 consequently require loss internal work in their digestion, 

 as explained on page 228. Though we have no nrieans of 

 accurately computing the saving thus affected, it is doubt- 

 less considerable. 



Btill a third point, to which attention has recently been 

 drawn by Salmon,'^ is the fact stated by Mr. Miller, that 

 cows fed exclusively on meal drink but little water, averag- 

 ing about five quarts per day and head. Five (juarts equal 

 about 10|- pounds, while the amount consumed on an ordi- 

 nary ration of coarse fodder (estimating, according to 

 "Wolff, four poundB of water to one of dry matter) would 

 be not far from ^0 pounds. Allowing for the half-poxmd 

 of water in the corn meal, this shows a difference of 59 

 pouiids per day. 



Now we have already learned that an increased con- 

 sumption of water involves an increase in the amount of 

 matter oxidized in the body, particularly in that of the 

 non-nitrogenous matters. This increase is probably due 

 largely, if not wholly, to the demand thus made on the 

 body for heat to warm the water to the temperature of the 

 body and to evaporate part of it. (Compare pp. 234- 



QO'J \ 



If we assume the extra 59 pounds of water consumed 

 when coarse fodder is used to have a temperature of 

 32° F. when drunk, then warrainff this water to the tem- 

 perature of the body (100° F.) would require 1,016,971 



* Country 0-eafcleman, July 11, 1878. 



