I 312 PIGS 



Tablk II. — W inter in<^ cost of young Sows ivith faryoa-'. 



Weight of sows at the beginning of exi)ciinicnt 1 78 lbs 



" " " at the end " " 300.3 lbs 



Average dailj' increase per head o.qi lbs 



Cost of feeding to produce 100 lbs of gain in weight .... -St-.i" 



To produce 100 lbs of gain, 477 lbs of grain and iSi lbs of alfalfa were 

 required. 



The net wintering cost of a young sow was less than tliat of an old sow, 

 because the former shows a more rapid increase of live weight. 



Cost of feeding the porkling from birth until the time when it reached the 

 'weight of 50 pounds. — A comparison was made between porklings born of 

 tS old sows and others born of 24 young sows. The particulars of Table III 

 are the average of a period of 4 3' ears for the former and 5 years for the lat- 

 ter. The porklings were debited with the cost of feeding of the sows from 

 autumn to the time when they weighed 50 lbs (end of the experiment) , plus 

 the cost of feeding the porklings from weaning until the end of the experi- 

 ment. The difference between this total and the value of the increase of 

 live weight of the sows during the period of experiment forms the cost of 

 production of the porkling weighing 50 lbs. 



Table III. — Average Cost of Porklings weighing 50 lbs. 



Increase in live weight of sows during period of experiment . . 



Cost of feeding sows and porklings 



Number of young born at each litter 



Weight of young at birth 



Number of porklings which lived to the end of the experiments 



Age at which the weight of 50 lbs was attained 



Cost of food consinned for the production of this weight . . . . 



Comparison between the cost of production of the autumn-born porkling 

 and the spring-born porkling. — For 4 years a comparison was inade between 

 579 spring pigs born from old sows, 543 spring pig from young sows, and 153 

 autimin pigs from young sows. Their average costs of production (from the 

 moment immediately preceding littering until the time when the porklings 

 reached the weight of 50 lbs.) were $2.05, Si-8i and $2.03 respectively. 

 As compared with the old sows and their porklings, the young sows con- 

 sumed less grain. They reared nearly as many young, and the latter 

 increased in live weight with an almost equal rapidity. 



