ANIMAL PRODUCTION. 365 



In a grazing experiment covering KH days made to study the relative merits 

 of different l)reeds of pigs, tlie results were very similar, ranging from 0.7 lb. 

 per head per day with Yorkshires to 0.78 lb. with Tamworths. "As grazers, 

 pure-bred Tamworth swine were most superior. Berkshire, Poland China, and 

 Tamworth grades were about equal. Pure-bred Yorkshires were not equal to 

 the other breeds in feeding qualities, especially as grazers." 



From a summary of data regarding the cost of raising pigs and cattle the 

 following deductions were drawn : 



" The average cost of spring litters of G pigs each, including the cost of the 

 keep of the sow for one year, when disposed of at a weight of 893 lbs., was 

 $29.42. The average cost of fall litters of 7 pigs each, including the cost of the 

 keep of the sow for one year, when disposed of at a weight of 1,088 lbs., was 

 $36.90. The cost per hundred for spring pigs from weaning to a weight of 150 

 lbs. was $2.70, and of fall pigs fed through the winter to a weight of 135 lbs. 

 was $2.77. 



" The average cost of raising cattle to one year of age was $19 per head, 

 and to two years of age, at which time they averaged 1,037 lbs. in weight, 

 was $3tj.97." 



Tests similar to those noted above were also made with milch cows. (See 

 p. 369.) 



Experiments in swine feeding. The value of corn and supplementary- 

 feeds for pork production, \V. J. Kennedy and E. T. Robbins (lotca Hta. Biil. 

 91, pp. 61, figs, 23). — Corn meal alone and with varying proportions of ground 

 barley, wheat shorts, meat meal, and tankage was compared in tests with pigs, 

 as were also the relative merits of dry-lot feeding and pasturage and of timothy 

 and clover pasturage. 



Four lots of 12 well-grown pigs each were used in the first test, comparing 

 corn alone and with supplementary feeds, and the daily gains made in 32 days 

 on the several rations were per head as follows : Corn, 1.88 lbs. ; corn, barley, 

 and shorts 2 :1 :1, 2.21 lbs. ; corn and meat meal 9 :1, 2.68 lbs. ; and corn and 

 tankage 9:1, 2.34 lbs. 



When diffei'ent amounts of meat meal supplementing corn meal were studied 

 with 4 lots of 9 young pigs each, the average daily gain per head was 1.16 lbs. 

 on corn meal alone, 1.75 lbs. on corn meal and meat meal 7 : 1, 1.79 lbs. on corn 

 meal and meat meal 8.5 : 1, and 1.86 lbs. on corn meal and meat meal 10 : 1. 



The feed eaten per pound of gain in the above 2 tests ranged from 3.7 lbs. 

 with the mature pigs on corn and meat meal 9:1 to 5.57 lbs. with young pigs 

 on corn meal alone. The gain was most expensive with the latter lot. costing 



3.97 cts. per pound, and was least expensive, costing 3.15 cts., with the mature 

 pigs fed corn meal, barley, and shorts. 



A comparison of dry-lot feeding and pasturage and of the effects of supple- 

 menting corn by other concentrated feeds under these conditions was undertaken 

 with 10 lots containing 10 pigs each at the beginning of the trial, the test as a 

 whole covering 112 days. When corn and shorts 2 : 1 and 1 : 1, corn meal and 

 meat meal 5 : 1, and corn meal and tankage 5 : 1 were fed with timothy pas- 

 turage, the average daily gain ranged from 1.12 lbs. on corn and shorts 2 : 1 

 to 1.37 lbs. on corn and tankage 5:1. In the case of the same rations fed with- 

 out pasturage the gain ranged from 0.81 lb. on corn and shorts 2:1 to 1.09 lbs. 

 on corn and meat meal. On corn and timothy pasturage alone the average 

 daily gain was 0.92 lb. per pig and on corn and clover pasturage 1.19 lbs. Con- 

 sidering all the lots tho concentrated feed eaten per pound of gain ranged from 



3.98 lbs. with the lot fed corn and shorts 1:1 on timothy pasturage to 5.12 lbs. 

 with the lot fed corn and shorts 2 : 1 in a dry yard, and was on an average 

 4.29 lbs. The cost of a pound of gain ranged from 3..35 cts. with the lot pas- 



