EXPERIMENT STATION BULLETINS. 



215 



tions as in tests 2 and 3, but does not contain either tankage or skim 

 milk. The ration used in this case therefore serves as an indicator to 

 the value of both skim milk and tankage. 



The pigs used in this case were Yorkshire-Chester and Yorkshire- 

 Berkshire crosses divided as evenly as possible as regards breeding, 

 size and quality. These pigs went on feed at about the same average 

 weights as those of the previous tests, but were some older and were 

 fed seventy days. 



The following are the results of this check test: 



In the three tests including tankage and skim milk, the average cost 

 of production per cwt. with the tankage rations was $3.35, with the 

 skim milk rations |3.G2, and with the check ration of middlings, corn 

 meal and water |4.(J9. In the three original tests the tankage ration 

 pigs consumed an average 3.14 pounds meal mixture per pound gain, 

 those receiving skim milk in the ration required 2.48 pounds meal mix- 

 ture and 5.67 pounds skim milk per pound gain. In the check ration 

 consisting of corn meal and middlings the average amount of meal mix- 

 ture required per pound gain was 4.09 pounds. The average daily gains 

 from the three tankage rations was .98 pounds, from the three skim milk 

 rations 1.08 pounds, and from the check ration .8 pounds. Judging from 

 these figures we are therefore quite safe in concluding that though the 

 ration containing skim milk made a slightly greater gain than where 

 tankage was used, the cost of producing this increased gain was some- 

 what greater. Also that the check ration of middlings and corn meal 

 only, produced smaller gains at" a greater cost than either of the others. 

 The amount of dry matter required per pound gain with both tankage 

 and skim milk rations was about the same; in the check ration it was 

 somewhat greater. 



PART 2. 



DIGESTER TANKAGE FOR FATTENING SWINE. 



This part of the report deals with the use of digester tankage in the 

 ration for swine being fitted or finished for market; or, in other words, 

 the development of the hog from say one hundred and twenty pounds 



