3018.] ANIMAL PKODUCTION. 673 



would clean up. Lot 3 was fed whole barley in the hopper grinder, and as 

 much each of equal parts of shorts and oats in a grain mixture as they con- 

 sumed of the barley from the hopper grinder. They also received the same 

 quantity of skim milk as lots 1 and 2. Lot 4 was fed a grain mixture of equal 

 parts of shorts, finely ground oats, and finely ground barley fed in a self-feeder ; 

 also skim milk as in the other lots, but separately. 



Lot 1 made an average daily gain of LOG lbs. per head, at a cost of 3.5 cts. 

 per pound of gain ; lot 2, 1.12 lbs. daily, at 3.51 cts. per pound ; lot 3, 1.12 lbs., 

 at 4.6 cts. per pound ; and lot 4, 0.999 lb., at 3.58 cts. per pound. While the 

 results show little difference in the use of the self-feeder, the fact that it 

 required only half the time and labor as the usual methods of feeding indicates 

 its possibilities. 



An experiment was made at the same station with litters of young pigs from 

 the time they began to eat until they were three months old, comparing linseed 

 oil meal and tankage, skim milk and tankage, and single meals and a mixture 

 of two or three meals with and without skim milk. The objects of the experi- 

 ment were similar to tho.se of the previous year (E. S. R., 36, p. 68), except 

 that corn was the basis of the ration then while barley was, for purposes of 

 economy, the basis in the present work. The experiment continued for 84 days. 

 Lot 1, containing 10 Yorkshire pigs, on a ration of ground barley, shorts, and 

 oil meal, 3:3:1, plus skim milk, made an average daily gain of 0.96 lb., at a 

 cost of 2.97 cts. per pound of gain. Lot 2, 8 Berkshires, on a similar ration, 

 except that one part of tankage was used instead of the oil meal, gained 0.66 

 lb. daily, at a cost of 3.93 cts. Lot 3, 8 Yorkshires, was fed a ration of finely 

 ground barley and tankage, 6:1, plus skim milk, and made a daily gain of 

 0.97 lb., at a cost of 3.41 cts., while lot 4, 9 Berkshires, on the same ration, but 

 without the skim milk, gained 0.52 lb. daily, at a cost of 4.1 cts. Lot 5, 11 

 Yorkshires, on a ration of finely ground barley plus skim milk gained 0.S7 lb. 

 daily, at a cost of 3 cts. per pound. 



Compared with the experiment of the previous year there was little simi- 

 larity in the total gains per lot, but in cost of gains there was more concord- 

 ance. In this experiment oil meal gave better results than tankage, while 

 in the previous experiments they were practically identical. As in the previ- 

 ous experiment, increased gains were shown by replacing the shorts with 

 barley. The superiority of skim milk over tankage for economical gains is 

 indicated. 



An experiment was also made at the same station to compare the palatability, 

 the digestible economy, and the gains made by pigs fed on various meals on 

 the basis of protein content. The work was carried out with six lots of 5 

 pigs each, varying from 4 to 6 months of age, and with five lots from 2 to 3.5 

 months of age. 



In the first experiment, lasting 56 days, the pigs were fed shorts, gi-ound 

 barley, and skim milk. In addition lot 1 received ground corn and made an 

 average daily gain per head of 1.1 lbs. at a cost of 4.2 cts. per pound of gain ; 

 lot 2 with gluten feed made an average daily gain of 1.19 lbs. at a cost of 

 3,8 cts. ; lot 3 with cottonseed meal, an average daily gain of 1.26 lbs. at a cost 

 of 2.8 cts. ; lot 4 with linseed oil cake gained 1.24 lbs. daily at a cost of 3.2 

 cts. ; lot 5 with peanut oil meal, an average daily gain of 0.8 lb. at a cost of 4.3 

 cts. ; and lot 6 with fish meal, an average daily gain of 1.1 lbs. at 4.7 cts. per 

 pound. 



In the second test, with younger pigs, the lot on fish meal was omitted. 



The other five lots were fed as before. Lot 1 on ground corn gained 1.13 



lbs. daily at a cost to produce of 4.2 cts. ; lot 2 on gluten feed gained 1.07 lbs. 



at a cost of 4.2 cts. ; lot 3 on cottonseed meal gained 1.17 lbs„ at a cost of 3.5 



61347°— 18 6 



