530 SWINE IN AMERICA 



The experiments were interrupted by an outbreak of 

 "cholera." or the investigations would have been much 

 further extended. The report, in commenting- upon re- 

 suhs arrived at, says : "The experiment resuked in show- 

 ing that tlie cross-bred pigs made greater gains and con- 

 sumed more feed, but required less grain per loo pounds 

 gain. The cross-breds made a total gain of 704 pounds 

 and the Razor-Backs a gain of 462 pounds, and a daily 

 gain of 1.52 pounds and 1.02 pounds respectively. The 

 second generation of Razor-Backs made a total gain of 

 70 pounds over the representatives of the first genera- 

 tion. This shows very clearly what the change of en- 

 vironment did for the second generation ; their appear- 

 ance also indicated that they were capable of consuming 

 more food and putting on greater gains than the first 

 generation. The Razor-Backs made very irregular 

 gains, increasing considerably in one week and not any 

 the next. This was due to the fact that their appetites 

 were variable and they would overeat occasionally. This 

 may be attributed to inherited peculiarity, due to the 

 irregular food supply of their ancestors. Incidentally, 

 the value of skimmed milk when fed with a ration, such 

 as was given to these pigs, was worked out. It was 

 found that 100 pounds was worth the equivalent of 6.26 

 pounds of grain in the case of the cross-bred pigs, and 

 9.78 pounds of grain for the Razor-Backs. The reason 

 for this great difference in the value of skimmed milk 

 for these two lots was thought to be due to the fact 

 that the Razor-Backs have not been found to thrive best 

 on a heavy grain ration. It may be that the pigs of the 

 first generation made as good gains for the food con- 



