Investigations Concerning the Horse. 



281 



Cab Company. They determined the digestibility successively of 

 maintenance rations, rations fed horses when walking without 

 load, and rations for light-working horses. Three horses were 

 included in the experiments, the rations consisting of about three- 

 fourths grain and one-fourth coarse feed supplied in the following 

 quantities: 



Rations fed horses during digestion trials Grandeau and Leclerc. 



The three experimental rations stand in the ratio of 1: 1.1: 1.5. 

 Each period lasted a month, the three horses being successively 

 put on the same rations and subjected to the same conditions. The 

 horses weighed 972, 945 and 992 pounds at the beginning of the 

 experiments. The following average digestion coefficients for the 

 above rations were obtained: 



Digestion coefficients for rations fed three horses Grandeau and 



Leclerc. 



The digestibility of the rations when the horses were walking 

 a distance of about twelve miles per day was no smaller than when 

 at rest. There was an extreme depression of 5 per cent, in the 

 digestibility of the total organic matter and 7 per cent, in the 

 protein when the horses were worked hard. (433) It further 

 appears from the table that the digestion of cellulose, which 

 eccurs principally in the colon or large intestine, is affected more 



