Size of Litters 



109 



birth weight of all pigs farrowed by mature sows. The 

 figures in the first part of the table are from the records 

 of the Purdue University herd, while those in the last 

 are from records kept at the North Platte, Nebraska, 

 substation. 1 



TABLE XXII. EFFECT OF MATURITY OF Sow ON BIRTH 

 WEIGHT OF PIGS 



AVERAGE OF ALL 



The effect of the age of the sow on the birth weight of 

 the individual pigs farrowed is shown in another way in 

 Table XXIII. The data are the result of studies by 

 W. J. Carmichael. 2 



It would appear from both tables that there is a 

 tendency for the mature sows to produce slightly heavier 

 pigs individually than the gilts. The difference, how- 

 ever, is very small and does not mean that the pigs 

 from gilts are materially handicapped in their start in life. 



1 W. P. Snyder : Bull. 147. 



2 Master thesis: Univ. of 111., 1916. 



