EXPERIMENT STATION BULLETINS. 



515 



FIRST EXPERIMENT. PERIOD FOUR. 



Feed given, 7 . 5 pounds oat straw, 2 . 5 pounds clover liay, 1 pound bran, 1 pound corn and cob meal. 

 Total drv matter, 10.05 pounds per cow per day. 

 Nutritive ratio 1 to 12.2. 



Grams of Nitroqen in 



Cow 1. 



Cow 2. 



Urine. 



39.8 

 32.8 

 34.2 

 39.6 



146.4 

 36.6 



Daily gain, grams 1 



Daily loss 



Digestibility of proteids on basis of N. in wet feces 54.5% 



N. in dry feces 59. 3% 



N. in treated feces 64.5% 



Food. 



(1) 67.3 



(2) 67.3 



(3) 07.3 



(4) 07.3 



269.2 

 67.3 



Urine. 



40. ft 

 16. & 

 32.3 

 38.0' 



127.7 

 31.9- 



Daily gain, grams 4.6 



Daily loss 



Digestibility of proteids on basis of N. in wet feces . . 52 . 8% 



N. in dry feces ^^■^% 



N. in treated feces 64.9% 



SECOND EXPERIMENT, PERIOD ONE. 



The cows used in the second experiment were smaller and consumed less food than those of the first experiment. 

 Feed given 6 . 3 pounds oat straw, 2 pounds clover hay, . 8 pounds bran, . 8 pounds corn and cob meal. 

 Total dry matter, 8.78 pounds per cow per day. 

 Nutritive ratio 1 to 12.2. 



Grams of Nitrogen in 



Cow 1. 



Cow 2. 



Food. 



(1) 

 (2) 

 (3) 

 (4) 

 (5) 

 (6) 

 (7) 



50.3 

 60.4 

 50.1 

 50.2 

 49.4 

 50.5 

 50.2 



Sum 351.7 

 Avg. 50.2 



Urine. 



25.7 

 10.0 

 21.5 

 23.7 

 18.3 

 21.1 

 18.9 



145.8 

 20.8 



Daily gain, grams 2.4 



Daily loss 



Digestibility of proteids on basis of N. in wet feces 39. 1% 



N. in dry feces 45.8% 



N. in treated feces 56.6% 



Urine. 



15.3 



19.7 

 21.2 

 21.7 

 22.1 

 22.3 

 19.9 



143.2 

 20.3 



Daily gain, grams '. . . 5.7 



Daily loss ♦. 



Digestibility of proteids on basis of N. in wet feces. . . 46 . 9% 



N. in dry feces ^"^^ 



N. in treated feces 62. 3% 



