278 



Journal of Agricultural Research 



Vol. XV, No. s 



Tabl^ XI. — Daily heat production computed to 12 hours' standing and lying. 



Period and ration. 



ALFALFA HAY. 

 Period 5 



Period 6 



Period 7 



ALFALFA HAY AND STARCH 



Period I 



Period 3 



Period 2 



Period 4 



First day. Second day. Mean. 



Calories. 



13. 309 

 10, 940 



16, 394 



11,283 



10, 150 



8,483 



Calories. 



i3> 187 



11,512 



8,747 



IS, 635 



11,439 

 9,689 



8,325 



Calories. 

 137 248 

 II, 226 

 8,864 



16,015 



11,361 



9, 920 



8, 404 



ENERGY EXPENDITURE CONSEQUENT UPON FEED CONSUMPTION 



The heat production in this experiment shows the same marked 

 dependence upon the amount of feed consumed which has been noted in 

 all previous investigations. By a difference computation, the heat 

 increment caused by a unit of feed consumed may be computed. For 

 example, a comparison of periods 5 and 7 gives the following results: 



Table XII. — Exatnple of computation of heat increment due to feed 



Period. 



Period 5. 

 Period 7. 



Difference 



Difference per kilogram of dry matter. 



Dry matter 

 eaten. 



Gm. 



7,893 



3,502 



4,391 



Heat pro- 

 duction. 



Calories. 

 13, 248 

 8,864 



4,384 

 999 



Table XIII. — Heat increment per kilogram of dry matter 



In the same manner the heat increment per kilogram of the mixed 

 ration of hay and starch may be computed, while by a comparison of 

 these results with those on hay the energy expenditure per kilogram of 



