EXPERIMENT STATION BULLETINS. 



195 



jumI if sold at 5 cents there would be a margin or profit of 2.2 cents 

 per [jound, or a total profit of *24.C1 for seventeen head, which is a 

 profit of fl.45 per pig. 



Lois 5 and produced 0o7.8 pounds of gain at a food cost of 3.09 

 cents, and if sold for 5 cents there would be a margin or profit over 

 r«»od of l.Dl cents per pound, and a total profit of flT.Ol for ten 

 head, which is a profit of fl.TO per pig. There would then be a 

 margin of 34 cents per pig in favor of using the middlings with the 

 beans and corumeal. Further, since these pigs were all being fed for 

 growth and development of frame and feeding capacity rather than 

 for mere gains, the results from the use of the middlings was more 

 beneficial than a comparison of pounds of gain would indicate. 



CHECK LOTS. 



Skim-milk and Commeal. — In the whole list of feeds suitable for pig 

 growing which are available to the farmer, probably the one which he 

 would choose first would be skim-milk. Certain it is that such uniformly 

 good results have been obtained from its use that a ration of which it 

 forms a reasonable jjart is, in y^opular opinion, a standard, and has been 

 used quite widely for check or comparative purposes in swine exj>eri- 

 mentation. It was adopted in this experiment as a check protein feed 

 with which to compare cull beans, and a mixture of cull beans and 

 middlings, the carbohydrate f»ortion of the ration in each case being 

 obtained from cornmeal. 



Trials 7 and 8. — These trials were conducted during the spring and sum- 

 mer of 1906, and were immediately associated with Trials 3 and 4. 



Rations. — The ration in each case was composed of a mixture by 

 weight, of skim-milk 5 parts and cornmeal 1 part weighed and mixed at 

 the time of each feeding. The milk was sour when fed,*but no portion of 

 it was allowed to stand in the barrel more than twenty-four hours before 

 use. 



Pigs Used. — The fjigs used were four Berk-Yorkshire cross breds in 

 each pen and were from the same litters as those used in Trials 3 and 

 4. They were put on feed at the same time and all conditions except 

 food supply were the same throughout. 



The results are set forth in the following table: 



Table III. 



From the table given it will be observed that Lot 7 gained a total 

 of 381 pounds or an average of 1.36 pounds daily for the entire feed- 

 ing period of 70 days. Also, that the cost of these gains at the adopted 



