Massachusetts 

 Agricultural Experiment Station 



TECHNICAL BULLETIN No. 11 NOVEMBER, 1927 



INTENSITY OR RATE OF LAYING 

 IN RELATION TO FECUNDITY 



By F. A. HAYS and RUBY SANBORN 



This bulletin continues the series dealing with inherited traits in relation 

 to fecundity in the Rhode Island Red breed of domestic fowl. Intensity is 

 an inherited trait which vitally affects fecundity. In this study four meas- 

 ures of intensity have been used: first sixty-day egg record, mean size of 

 winter clutch, net winter rate of laying, and cuinual rate of laying. From 

 the standpoint of the breeder, mecin size of winter clutch is the most 

 satisfactory criterion of intensity because it can be accurately determined 

 and because it is inherited. 



Keqiiests for l)ulletin.s sliould be addressed to the 



AGRICULTURAL EXPERIMENT STATION 

 AMHERST, MASS. 



