276 



Journal of Agricultural Research 



Vol. XV. No. 5 



Table X. — Losses of chemical energy; metabolizable energy 



Feed and period. 



ALFALFA HAY. 



Period 5 



Period 6 



Period 7 



Weighted averages. 



ALFALFA HAY AND 

 STARCH. 



Period i 



Period 3 



Period 2 



Period 4 



Weighted averages. 



Weighted averages 

 for periods i, 2, 

 and 4 



COMPUTED FOR 

 STARCH. 



Period i 



Period 3 



Period 2 



Period 4 



Weighted averages. 



Weighted averages 

 for periods 1,2, 



and 4 



Kellner 's average .... 



Energy per kilogram of dry 

 matter. 



Losses. 



Cal. 



4,333 

 4,335 

 4,335 



4,334 



4,267 

 4,306 

 4,306 

 4, 266 



4, 284 



4,276 



4, 105 

 4, 105 

 4, 105 

 4, 105 



4,105 



4,105 

 4, 152 



Cal. 



1,875 

 I, 840 

 1,792 



1,846 



395 

 1,465 



353 

 1,345 



1,400 



1,376 



296 

 487 

 116 

 134 



C-al 



252 



255 



257 



166 



193 



204 



180 



179 



-53 

 -12 



34 

 76 



293 -II 



224 

 731 



-10 



-27 



Cal. 

 293 



302 



293 



Cal. 

 1,913 

 1,951 

 1,971 



1,938 



341 

 393 

 398 

 448 



378 



373 



456 

 623 



541 

 823 



579 



563 

 382 



2,365 

 2, 268 

 2, 362 

 2, 269 



2,326 



2,348 



3,406 

 3,007 

 3,314 

 3,072 



3,244 



3,328 

 3,066 



tX_Q 



N E 2 

 ■^3 



n "a 



Cal 



3,516 

 3,507 

 3,490 



3,507 



3>596 

 3,509 

 3,516 

 3,368 



3,530 



3,538 



3,707 

 3,474 

 3,495 

 3,182 



3,541 



3,563 

 3,603 



Percentage losses. 



43-27 

 42.45 

 41-35 



42. 60 



32.70 

 34.02 

 31-43 

 31-51 



32.68 



32.18 



7- 



11.86 



2.84 



3-25 



7.14 



5-46 

 17. 61 



5.82 



5-87 

 6. 22 



5-92 



3-90 

 4. 20 



4-49 

 4.78 



4. 20 



4. 19 



-1.30 



-o. 29 



0.83 



1.86 



-o. 24 



-o. 24 



-0.66 



6.76 

 6.67 

 6.96 



6. 77 



7-98 



9. 12 



9. 26 



10.51 



8.82 



8. 72 



II. 10 



15- 19 

 15.62 

 20.05 



14. 10 



13-71 

 9. 21 



44- IS 



45- 01 

 45-47 



44. 71 



55-42 

 52. 66 

 54.82 

 53- 20 



54-3° 



54-91 



82.98 



73-24 

 80.71 

 74.84 



79-03 



81.07 

 73-84 



o Corrected to N equilibrium. 



It has already been noted that mth the exception of period 3 the diges- 

 tibihty increased as the total amount of the ration was decreased. The 

 converse of this is shown in Table X, of course, in the decreased losses in 

 the feces. On the other hand, the losses in the urine and methane show a 

 distinct increase on the lower rations. As in previous experiments, the 

 greater digestibility of the smaller rations was apparently due largely to 

 the greater extent of the methane fermentation accompanied by the ex- 

 cretion of more katabolic products of some sort in the urine. As a con- 

 sequence, the metabolizable energy per kilogram of digested dry matter 



