No. 614] 



EGG PRODUCTION 



There is another way in which the close relation be- 

 tween age at first egg (also date of first egg) and the 

 winter egg record can be shown, for it follows that the 

 higher the age at first egg the lower the winter record 



TABLE II 



Average Winter Egg Production for Each Winter Month of 1915-16, 

 by Hatches 



should be. In calculating this coefficient of correlation 

 it is necessary that the birds should all be hatched at the 

 same time, so that for our flocks, which were hatched at 

 intervals of one week, it would be necessary to form as 

 many correlation tables as there were hatches. The prob- 

 able results did not seem to warrant the labor involved, at 



TABLE III 



