316 THE FEEDING OF ANIMALS 



for fourteen months on 17.6 pounds of hay a day, from 

 which the three animals digested an average of 6.06 pounds 

 of organic matter. Using the method of computation 

 already described, this is equal to 6.75 pounds of digesti- 

 ble nutrients for a 1,000-pound horse, a result not greatly 

 different from that of Zuntz. 



The latest conclusion of Wolff was that a 1,100- 

 pound horse should have for maintenance at rest 7.26 

 pounds of digestible organic matter daily, exclusive of 

 the digested crude fiber, which would be the same as 

 6.78 pounds of fiber-free nutrients for a 1,000-pound 

 horse. As Wolff regarded the fiber as useless to a horse, 

 either for maintenance or for production of work, the 

 last figures represent his estimate of the maintenance 

 needs of a horse at rest. 



It is proper to remark that Wolff's views as to the 

 nutritive value of crude fiber are not generally accepted. 



The following maintenance standards, based on pro- 

 duction values, are offered by Armsby : 



In calculating rations for horses, the coefficient of 

 digestibility obtained in experiments with this class of 

 animals should be used, coarse fodders, as stated pre- 

 viously, not being so efficiently digested by horses as 

 by bovines or sheep. 



