EXPERIMENT STATION BULLETINS. 



273 



in live weight from 62.6 pounds to 124.2 pounds at the rate of 1.09 

 pounds per head daily. At the same time, the five pigs of Lot II con- 

 sumed an average of 3.29 pounds meal mixture and 3.5 pounds skim 

 milk, while increasing in live weight from 64.6 pounds to 130.8 pounds 

 at the rate of 1.18 pounds per head daily. Though the rate of gain and 

 cost of production in this test are slightly in favor of the skim milk 

 fed pigs, still, the margin of difference in both instances is extremely 

 small. Throughout this test absolutely no difference could be detected 

 between the two pens as to thriftiness and feeding quality. 



TEST NO. 2. 



Digester Tankage vs STdm Milk for Groicing Sivine Beticeen 58 and 



128 Days of Age. 



In this test the ration for Lot III was made up in the following pro- 

 portions by weight, viz. : Middlings 20 pounds, corn meal 10 pounds and 

 digester tankage 3 pounds; the tankage formed one-eleventh of the 

 mixture. To this food sufficient water was added to form a slop. Lot 

 IV was fed a ration of the following proportions, viz. : Middlings 20 

 pounds, corn meal 10 pounds and skim milk 90 pounds, three pounds of 

 skim milk being used to every pound of meal mixture. 



The animals used in this test were the offspring of a Duroc-Jersey 

 boar and Tamworth sow. Twelve pigs were farrowed March 12, 1905, 

 but only eight were raised. On May 9th, when these pigs were 58 days 

 old, they were weaned and divided into two lots of four each, according 

 to weight and quality. There was one barrow and three sows in each 

 pen. 



The results of this test are summed up in the following table: 



During the 70 days of this test the four pigs of Lot III consumed 

 an average of 3.14 pounds of their meal mixture per head daily, 

 while increasing in live weight from 39.7 pounds to 110.7 pounds at the 

 rate of 1.01 pounds per head daily. At the same time the four pigs of 

 Lot IV consumed on an average 2.63 pounds of their meal mixture and 

 7.89 pounds skim milk per head daily, while increasing in live weight 

 from 38 pounds to 115.7 pounds at the rate of 1.11 pounds per head 

 daily. 



In this test the actual increase in live weight was a trifle greater for 

 Lot IV receiving skim milk, but the cost of production per cwt. was 

 51c less for Lot III receiving tankage in the place of skim milk. No 

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