498 



Feeds and Feeding. 



It is shown that in all constituents sow's milk is richer than that 

 of the cow. Woll 1 found the fat globules of sow's milk only one- 

 fourth as large as those of cow's milk, but 8 times as numerous. (594) 



813. The sow as a milk producer. Woll 2 found that a sow weigh- 

 ing 438 Ibs. gave 7.7 Ibs. of milk in 1 day, consuming in that time 4 

 Ibs. of corn meal, 4 Ibs. of wheat middlings, and 8 Ibs. of skim milk. 

 Such findings show that sows good for breeding purposes rank with 

 good dairy cows in their ability to convert feed into milk. (590-91) 



814. Gain of young pigs. To show the rate of gain by young 

 pigs before and after weaning, the following table is taken from a 

 study by the author at the Wisconsin Station, 3 the data covering 70 

 days before and 49 days after weaning: 



Weight of a litter of pigs at birth and gains before and after weaning. 



Before weaning" 



After weaning 1 



It will be seen that the sow lost 29 Ibs. in weight while suckling 

 her pigs, which gained from 21.8 to 57.3 Ibs. each in 10 weeks be- 

 tween farrowing and weaning. For the 7 weeks succeeding wean- 

 ing the individual gains ranged from 31 to 54 Ibs. It is possible for 



1 Rpt. 1897. 



2 Loc. cit. 



3 Rpt. 1890. 



