MAINTENANCE RATIONS OF HORSES. 



59 



on the other 1| kilograms of oats. The nutrients digested in each case and 

 the equivalent amounts of work secured were : 



Nutrients equivalent to work — Wolff, 1886-87. 



Period. 



Ration. 



Digested. 



Equivalent 

 work. 



Protein. 



Crude 

 fiber. 



Nitrogen- Ether 

 free extract, extract. 



Total (fat 

 X 2.4). 



I-III... 



V 



VI 

 V 



7 kilograms hay, 5.5 kilo- 



3 kilograms hay, 5.5 kilo- 

 grams oats 



4 kilograms hay 



Per 100 revolutions 



Grams. 

 822. 58 



626.46 



Grams. 

 816.68 



422. 74 



Grams. 

 3,889. 64 



3,068. 78 



Grams. 

 186. 72 



184. 78 



Grams. 

 5, 973. 62 



4, 561. 13 



Revolutions. 



750 



350 



196. 12 



393. 94 



821. 18 



1.94 



1,412.49 

 353. 12 



400 



3 kilograms hay, 7 kilo- 

 grams oats 



3 kilograms hay, 5.5 kilo- 

 grams oats 



].5 kilograms oats 



Per 100 revolutions 













754.52 

 626. 46 



355. 24 

 393. 94 



3, 719. 24 

 3,068. 46 



252. 17 

 184. 78 



5, 434. 21 

 4, 561. 13 



700 

 350 



128. 06 



-67. 50" 



650. 78 



67.39 



873. 08 

 249. 45 



350 















The relative value of the digested matter of hay and of oats for work 

 production in these trials was thus approximately as 5 : 7. 



The digestible nutrients added to the ration by the oats in period VI in- 

 cluded no crude fiber, and, as the table shows. 249 grains of these fiber-free 

 nutrients were found equivalent to 100 revolutions of the dynamometer with 

 a draft of 60 kilograms, which is practically equivalent to the 315 grams per 

 100 revolutions with 76 kilograms draft found in the earlier experiments 

 (p. 57) in which also, as was noted, the additional nutrients were practically 

 fiber-free. Of the digestible nutrients added to the ration in the form of hay 

 in period I-III, on the other hand, over one- fourth consisted of crude fiber, 

 and in this case 353 grams were found to be equivalent to 100 revolutions 

 of the dynamometer. If, however, the digestible crude fiber be omitted in this 

 case, it appears that the fiber-free nutrients of the hay were practically equiv- 

 alent to those of the oats, 255 grams being required for each 100 revolutions. 



As noted previously, Wolff recomputed his experiments on the assumption 

 that the crude fiber was valueless, and obtained results expressed in terms of 

 fiber-free nutrients which were consistent among themselves and agreed with 

 those obtained by Grandeau. The following table contains a summary of the 

 results obtained for the maintenance ration expressed both in terms of total 

 nutrients (including digestible crude fiber) and of fiber-free nutrients: 



Nutrients for maintenance per 500 kilograms live weight — Wolff. 



Experiments. 



Including 

 fiber. 



Fiber-free. 



Experiments of 1881-1885; 



Horse I t_- 



Horse II 



Horse III 



Average 



Experiments of 1885-86— Horse III: 



Period I 



Period II 



Period III and V 



Period VII 



Period VIII 



Period IX 



Average 



1 Omitting period IX 



Grams. 



Grams. 



4,143 



3,378 



4,260 



3,282 



4,167 



3,306 



4, 190 



3.322 



4,141 



3,142 



4, 194 



3,353 



4,212 



3,413 



4,310 



3,549 



4,310 



3,490 



[4, 586] 



3,335 



i 4,232 



3,430 



