Sex-Determination in Sheep 



53 



The mothers of the 18 female lambs 92.6 lbs.; November 85.3 lbs- Deeembcr 



weighed 1561 lbs. end of September, 

 1900; 1667 lbs. end of October; 1535 

 lbs. end of November; 1495 lbs. end of 

 December. The average weights being : 

 End of September 86.7 lbs.; October 



83.1 lbs. 



Dr. Bell therefore prepared a table 

 combining all the observations ac- 

 cessible from his records, as fol- 

 lows: 



Weights of Mothers of Male Lambs 

 {Taken in Autumn preceding birth of lambs) 



Weights of Mothers of Female Lambs 



