FERTILIZER CONTROL STATION. 



357 



were given a ration of equal weight in which beef scrap was substi- 

 tuted for a portion of the corn gained 8 j pounds. This was an av- 

 erage gain of one- third of a pound for each bird in the first lot, and 

 almost three-fourths of a pound for each bird in the second lot. 



The pounds of food eaten in the seventeen days, with the cost of 

 the same, are given below. The corn is reckoned at 62J cents for 

 fifty pounds, and the beef scrap cost 2J cents per pound. 



Corn. 



Scrap. 



Lot L 



Lot 2. 



27J lbs. 

 21i " 



6 lbs. 



Total Fed. Cost of Food. 



27^ lbs. 

 27^ " 



39^ cts. 

 43| " 



Cost per lb. 

 of Gain. 



8.6 cts. 

 4.77 " 



On October 29th, an equal weight of dried blood was substituted 

 for the beef scrap, the weights of corn fed in the two cases remain- 

 ing the same, and these rations were fed for fourteen days. 



Below can be seen the weights of the two lots at the beginning 

 and end of this period : 



Lot 1 

 Lot 2 



Oct. 29th. Nov. 12th. 



39i lbs. 

 43| '• 



43| lbs. 



474 " 



Qain. 



44 lbs. 

 3^ '• 



Here the advantage seems to be slightly with the pure cracked 

 corn, which tends to throw suspicion on the correctness of the re- 

 sult when beef scrap was fed. There is quite a difference in the 

 composition of the beef scrap and blood, which can be seen by the 

 following analyses : 



An equal weight of the blood contains onl}' about half as much fat 

 as the scrap, but this difference alone does not seem sufficient to 

 explain the apparent difference in effect. 



