Massachusetts 

 agricultural experiment station 



BULLETIN No. 289 DECEMBER, 1932 



Hereditary and Environmental 



Factors Affecting 

 Variability in Egg Production 



By F. A. Hays 



It is generally conceded that the egg production of fowls is influenced 

 by heritage and environment. There are, however, many factors that 

 contribute to these influences, and it should be of scientific interest 

 and economic importance to evaluate some of them. This investigation 

 and the results reported here constitute such an attempt. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, MASS. 



