SCIENCE 



whereas for the other months of the eight 

 considered the reverse is true. The average 

 percentage difference is 30.4 in the Storrs 

 series and 26.6 in the Vineland series. 



Thus the constants show conspicuous differ 

 ences of great practical significance in the 



first (pullet) year records of birds which did 

 and those which did not lay during the 

 individual months of the first year. The 

 results for the first year records at Storrs and 

 the first year records at Vineland are in fair 

 agreement. 



MEAN ANNUAL PRODUCTION FOR FIRST AND SECOND YEAR FOR BIRDS WHICH DID AND WHICH DID NOT LAY DURING 



INDIVIDUAL MONTHS OF THE FIRST YEAR 



