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 



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 



Ept. 1897. 



2 Loc. cit. 



Bpt. 1890. 



