40 



Feeds and Feeding. 



The table shows that the 700 grams of hay fed contained 586.1 

 grams of dry matter, and that the solid excrement for 1 day, which 

 represented the undigested portion of the ration, contained 288.6 

 grams. The difference, 297.5 grams, or 50.8 per ct., is held to be 

 the dry matter digested. The average dry matter digested in 2 

 such trials was 51.2 per ct. Of the 77.7 grams of crude protein sup- 

 plied, 40.4 grams appeared in the solid excrement. The difference, 

 37.3 grams, or 48 per ct., represents the digested crude protein. In 

 like manner the percentage of the other nutrients digested was de- 

 termined. 



The average percentage of each nutrient digested in a feeding 

 stuff is termed the coefficient of digestibility for that nutrient in the 

 feed. 



59. Digestibility of malt sprouts. — The sheep were next fed the 

 following ration of 600 grams of clover hay and 175 grams of malt 

 sprouts. 



The digestibility of malt sprouts was determined indirectly in 

 the following manner: The dry matter of the clover hay and malt 

 sprouts together equaled 655 grams. The excreted dry matter 

 from this equaled 295.2 grams, so that the total quantity digested 

 was the difference, or 359.8 grams. In the previous trial it was 

 found as the average of 2 periods that 51.2 per ct. of the dry matter 

 in clover hay was digestible. Taking 51.2 per ct. of 500.9 grams 

 gives 256.4 grams, which is the probable quantity of dry matter 

 that was digested from the hay. Subtracting 256.4 from 359.8 

 grams, there is left 103.4 grams, or 67.1 per ct., which is taken as 

 the per cent of dry matter digested from the malt sprouts. In a 



