Investigations Concerning the Horse. 



277 



fodders, is of no value to the horse either for maintenance or for 

 production of wwk, the decomposition of cellulose taking place in 

 the colon through the action of ferments, after it has passed the 

 digestive tract. For keeping a horse of 1, 100 pounds weight at 

 maintenance, 9.25 pounds of digestible matter are required in the 

 ration, as has been seen. Of crude fiber-free nutrients, 7.28 to 

 7.50 pounds were found necessary, an average of 7.39 pounds. 

 This result is an average of thirty-eight experiments with three 

 horses and agrees closely with the findings of Grandeau and 

 Leclerc, who obtained 7.47 pounds as the average of six closely 

 agreeing experiments with two horses. 



436. Work possible from one pound of feed. Beyond the 7.39 

 pounds of digestible crude fiber-free nutrients required for the 

 maintenance of a 1, 100 pound horse, each additional . 22 of a pound 

 (100 grams) of the crude fiber-free digestible nutrients will, ac- 

 cording to Wolff, increase the power of the horse for muscular 

 work about 400,000 foot-pounds. The table presented below 

 shows the total available work possible from one pound of com- 

 mon feeding stuff on this basis: 



Work, in foot-pounds, obtainable from one pound of various food 

 substances when fed to the horse Wolff. 



