168 



EXPERIMENT STATION RECORD. 



lost 0.091 kg. protein and 0.102 kg. fat. The fuel value of tlie food, 

 urine, and feces was determined by the bomb calorimeter. A consider- 

 able portion of the crude fiber and ether extract of the food and feces 

 was prepared and the fuel value determined. It was found that the 

 fuel value of crude fiber and ether extract was somewhat different in 

 the materials prepared from the two sources. Taking into account 

 these values and previous work, the fuel value of digestible crude fiber 

 was calculated to be 4.219 calories, of ether extract 8.322 calories, and 

 of nitrogen-free extract 4.232 calories per gram. 



Taking into account the fuel value of food and excretory products, 

 and of the gain or loss of body tissue, the balance of income and 

 outgo of energy in the two experiments was determined. (The balance 

 is not complete, since the author did not measure the energy liberated 

 as heat or used for external muscular work.) The fuel value of these 

 factors was as follows : 



Fuel value of food actually consumed, excretory products, and tissue gained and lost in 



experiments with steer*. 



Experiment I : 



Meadow hay (7,263 gm.) 



Feces (2,547 gin.) 



Urine, dry matter (G33.7 gm.) . 



Metban (158.4) 



Protein tissue gained (39 gin.) 

 Fatty tissue gained (139 gm.) . 



Total outgo and stored material 

 Balance 



Experiment II : 



Meadow hay (3,491 gm.) 



Oat straw (4,li6 gm.) 



Feces (3,086 gm.): 



Urine, dry matter (542.5 gm.) 



Methan (174.7 gm.) 



Protein tissue from body . 



Fatty tissue from body 



Total outgo. 

 Balance 



Income. 



Calories. 

 32, 177. 3 



14, 842. 8 



15,426.4 

 18, 368 



405.3 

 969.0 



Outgo. 



Calories. 



16, 729. 1 



11,750 3 



1, 945. 



2,098.2 



220.5 



1,320.5 



17,334.5 



14, 576. 1 



1, 549. 4 



2, 314. 1 



18, 439. 6 



From their own experiments, and from experiments by Kiihn, the 

 authors calculate that for steers 24,000 calories of energy per day per 

 1,000 kg. live weight are necessary for maintenance, and that the nutri- 

 tive elements of hay of fair quality and similar feeding stuffs furnish 

 about 3.5 calories per gram. 



Feeding for beef, E. E. Lloyd and J S. Moore (Mississippi Sta. 

 Bui. 39, pp. 157-166). — An experiment divided into 2 periods was 

 made with 30 Texas and 28 native steers to test the value of shredded 

 corn fodder and jack bean (Canavalia ensiformis), and to compare them 

 with rations of ordinary hays and cotton-seed meal. The Texas steers, 

 3 and 4 years old, were divided into G lots of 5 each; and the natives, 

 2 and 3 years old, were divided into 4 lots of 5 each and 2 lots of 2 each. 

 The Texas steers were dehorned. For 3 months before the test they 



