130 MAINE AGRICULTURAL EXPERIMENT STATION. I909. 



TABLE XI. 



Showing the Correlation between Fertility of Eggs and Winter 

 (November to March) Egg Production. Hatching Season 

 of ipop. Pullets only. 



out the relative influence of this factor is to determine the 

 degree of correlation which exists between winter production 

 and fertility of eggs. Just as before, one must be sure that 

 one understands the problem involved here. Will the indi- 

 vidual hen which has laid heavily in the winter have on the 

 average, or in the long run, a higher record for fertility during 

 the hatching season than one that has not laid heavily, and 

 vice versa f To answer this cjuestion it is necessary to con- 

 struct a correlation table between the two variables — winter 

 egg laying on the one hand and fertility of eggs on the other 

 hand. If there is any influence of previous egg laying on fer- 

 tility of eggs we shall expect to see it manifested in this table 

 and in the measure of correlation which can be deduced there- 

 from. 



Such correlation tables between fertility of egg and winter 

 production for the 1908 and 1909 seasons are presented in 



