602 



Feeds and Feedmg. 



These results indicate a tendency toward a poorer utiliza- 

 tion of tlie feed in tlie heavier feeding; the differences obtained 

 are not, however, so great as in the case of winter and summer 

 feeding. 



907. Feed required for 100 pounds of gain. — In the following 

 table 1 the grain or its equivalent required for 100 pounds of 

 gain is reported for 355 animals in 16 experiments. These trials 

 were with pigs ranging from 35 to 315 pounds, live weight. The 

 figures given in the second liue of the table are the arithmetical 

 means of all figures for pigs coming within the range of live 

 weight given in each column. Seven experiments supplying 

 additional data for the five intermediate periods are given in the 

 third line. The results of these important tuvestigations are 

 summarized in the following table: 



Grain or equivalent fed to produce 100 pounds gain with pigs — 

 Copenhagen Station. 



I. 



35-75 

 lbs. 



Average weight of pigs in lots - 



II. 



75-115 

 lbs. 



Ill 



115-155 

 lbs. 



IV, 



155-195 

 lbs, 



V. 



195-235 

 lbs. 



VI. 



235-275 

 lbs. 



VII. 



275-315 

 lbs. 



No. of experiments.... 



Av. feed required, lbs, 



Av. feed required in 



seven comparative 



experiments, lbs.... 



3 



376 



10 

 435 



437 



13 

 466 



465 



15 

 513 



499 



14 

 540 



543 



11 

 614 



624 



3 

 639 



We notice a steady increase in the feed required to produce 

 100 pounds of gain with increasing weight of the animals. Pigs 

 weighing 275 pounds required nearly twice as much feed for 100 

 pounds of increase as those weighing from 35 to 75 pounds. 

 (845) j 



908. Barrows compared with sows. — The following table, ^ 

 which includes data obtained from 1,216 animals, gives informa- 

 tion concerning the comparative fattening qualities of barrows 

 and sows. 



Although data from a large number of animals were employed 

 in the computation, the table shows no practical difference in 



' Rept, 30, 1895. • Loo. cit. 



