132 RESULTS OF EXPERIMENTS IN SWINE FEEDING 



tendency to produce more fat in the body of a Kog than would 

 feeds which contain a higher percentage of protein and ash. 

 Without going into details, it may be said that com was fed 

 in opposition to mixtures containing such feeds as. dried blood, 

 wheat middlings, peas, skim-milk, bran, and cow-peas, which 

 are feeds much richer than com in protein. 



Results. — The methods employed in the investigation 

 varied somewhat, but the general results were as follows: 



1. The pigs fed the protein-rich ration generally dressed 

 a somewhat lower percentage of their live weight than those 

 fed the corn ration. 



2. In nearly every case the pigs fed the protein-rich ration 

 had the largest quantity of blood, and in every case they had 

 heavier livers than the others. Their kidneys were also heavier, 

 as a rule, though there were some exceptions. 



3. In the Wisconsin and Kansas experiments, the tender- 

 loin muscles were removed and weighed, and in both cases 

 these were heavier in the case of the protein-fed pigs. The 

 tenderloin muscle is an indication of the amount of lean 

 throughout the carcass, and hence it was demonstrated that 

 the carcasses of the protein-fed pigs contained more lean than 

 the others. 



4. As a rule, the corn-fed pigs gave more leaf -lard than the 

 others. 



5. At the Wisconsin and Kansas stations, the breaking 

 strength of the thigh-bones was tested by a machine designed 

 for such purposes, and in every case the bones from the pigs 

 fed the mixed ration proved stronger than those of the corn-fed 

 pigs, the difference being as high as 32 per cent in one trial. 



Limitations. — Though the experiments described demon- 

 strate very clearly that it is possible to modify the carcass of 

 the pig by a judicious selection of feeds, we must not assume 



