136 RESULTS OF EXPERIMENTS IN SWINE FEEDING 



calls for .6 of a pound of digestible protein per day per 100 

 pounds, live weight. During the next seven weeks there is a 

 uniform increase each week until the pigs are receiving .7 of 

 a pound per day per 100 pounds, live weight. During the 

 next four weeks there is a uniform decrease to the starting- 

 point of .6 of a pound daily per 100 pounds, live weight. 

 Eleven weeks have now elapsed since the commencement of 

 the feeding period, and at the beginning of the twelfth week, 

 the protein is increased to .65 of a pound per day per 100 

 pounds, live weight, and is maintained at this point until the 

 pig is six months old. After the pig is six months old, it is fed 

 largely upon carbonaceous feeds, though it has been found an 

 advantage to supply rather more protein than is found in corn. 



It will be seen that the weekly increase of digestible protein 

 during the first seven weeks is about .014 of a pound. The 

 weekly decrease during the eighth, ninth, tenth, and eleventh 

 weeks is .25 of a pound. Then there is an increase for the 

 twelfth week of .25 of a pound, and the allowance is then 

 kept uniform until the pig is six months old. 



Carbohydrates. — For pigs two months old the standard 

 calls for a daily allowance of 2.2 pounds of digestible carbo- 

 hydrates per 100 pounds, live weight, with a uniform increase, 

 week by week, until the pigs are 6 months old, at which time 

 the daily allowance is 2.6 pounds of digestible carbohydrates 

 per 100 pounds, live weight. The author of the circular states 

 that their latest investigations indicate that the carbohydrate 

 allowance might start at 2.4 pounds and end at 2.8 pounds. 

 After the pigs are 6 months old the ration is largely car- 

 bonaceous. According to the standard given, the weekly in- 

 crease in digestible carbohydrates amounts to about .02 of a 

 pound. 



Ether Extract or Fat. — The fat content of the ration was 

 found diffictilt to control, but the author states that pigs will 



