120 



LAWSON G. LOWKEY 



116 thiys according to the age of the mother, and by Spencer 

 ('98) as 16 weeks. This would place the usual time as 16 

 weeks or 112 days. 



Long ('06) gives some figures for the weight of litters from one 

 year old sows. The litters average 7 . 8 pigs to the litter, the total 



39 



58 



84 107 130 



Body Length in Millimeters 



Fig. 5 Curves showing the relative growth of the pancreas, thyroid and supra- 

 renal glands. These curves were secured by arranging the average percent- 

 age (for the litter) which the organs foi-m of the net body weight, according 

 to the average body length (in millimeters). In certain cases, several litters 

 are combined, the average of the litter averages being taken (see above). The 

 broken line at the right shows the trend of the post-natal relations, as indicated 

 by the observations on the adults. The information thus gained is only gen- 

 eral, as there are no indications concerning the age of the specimens, or the 

 rapidity with which the changes take place. 



average weight being about 14 . 2 lbs, or about 6,442 gms. This 

 is an average weight of about 826 g. per pig. For sows two to 

 three years old, the pigs average about 1,190 g. each. For those 

 about five years old, the pigs are still larger, weighing about 1300g. 

 each on the average (individual data not given). 



