No. 595] 



SEX CONTROL IN PIGEONS 



CHART II— Continued 



have appeared statements concerning a predommance- 

 or a lack of predominance- of males from the first egg 

 and of females from the second egg of the pigeon's clutch. 

 It is unnecessary to outline these divergent reports. It 

 is only necessary to point ont the reason for discordance; 

 though the reason we had thought to be quite obvious 

 since 1911. The statements hitherto made have all been 

 based on a general statistical method, which is a wholly 



