248 



Eael W. Benjamin 



Pig. 23. shadow photographic record of relation between shape of egg incu- 

 bated AND shape of eggs PRODUCED BY THE RESULTANT CHICK 



Each row of progeny production shows twelve eggs, which were selected at regular intervals during the 

 respective year's production. All eggs were photographed each year, bat only twelve eggs for each year 

 could be represented in this group 



