Mar. 23, 191S Energy Values of Feeding Stuffs for Cattle 



477 



Table XI. — Average increments of heat production per kilogram of dry matter 



Feeding stuff. 



Coarse fodders: 



Timothy hay 



Red clover hay: 



Average 



Experiment 179 



Mixed hay 



Alfalfa hay 



Alfalfa meal • 



Average of alfalfa hay and 



meal 



Maize stover 



Mixed rations: 



Alfalfa hay and grain mixture 

 No. 2 



Average of all 



Average of periods i and 2 only 



Mixed hay and maize meal 



Mixed hay and hominy chop 



Concentrates: 



Maize meal added to clover hay. . . . 



Maize meal computed from mixed 

 ration 



Hominy chop computed from 

 mixed ration 



Wheat bran added to timothy hay. 



Grain mixture No. i added to timo- 

 thy hay 



Grain mixture No. 2 computed from 

 mixed ration 



The same from periods i and 2 only 



Total 

 incre- 

 ment. 



Cats. 

 782 



723 



992 



980 



1,165 



I, 190 



1,169 

 1.065 



1,139 

 I, 160 

 1,297 

 I, 147 



1,434 



1,363 

 1,177 



1,327 



I, 125 

 I, 141 



Analysis of heat increment. 



Standing 

 12 hours. 



Cats. 

 141 



344 

 412 



68 

 169 



121 



161 



lOI 



20 

 127 

 287 



36 



375 

 386 



30 

 93 



331 



-19 

 128 



Rising 



and 



lying 



down. 



Cats. 



10 



II 



4 



5 



3 



S 

 -16 



CHi 



fermenta- 

 tion. 



Cats. 

 132 



96 

 123 

 123 

 102 



97 



lOI 



105 



138 

 107 

 140 

 132 



i8S 

 146 



146 

 142 



161 



160 

 no 



Remain- 

 der. 



Cats. 

 504 



273 

 446 



785 

 889 

 969 



902 

 87s 



977 

 921 

 871 

 972 



393 

 906 



1,180 

 943 



831 



9S2 

 900 



comparison op coarse feeds and concentrates 



The average results recorded in Table XI for the total increase in 

 metabolism resulting from the consumption of i kg. of dry matter of 

 the several rations — i. e., for the so-called "work of digestion" in the 

 widest sense — are far from being in accord with common conceptions. 

 Unconsciously misled by an unfortunate terminology, we have been 

 accustomed to think of the more coarse and woody feeds, like hay, 

 straw, stover, etc., as requiring a greater expenditure of energy in their 

 digestion and assimilation than the more concentrated and highly 

 digestible grains, for example. It may be somewhat surprising, there- 

 fore, to note the relatively small differences found in this respect between 

 different classes of feeding stuffs, as shown by the averages of Table 

 XI and by figure 2. For example, the expenditure of energy caused 

 by maize meal in experiment 179 was almost as great as that caused by 



