230 



Earl W. Benjamin 



3eaonc/ (/ec7/:s Th/'n/ t/ears /ou///? i/ears f/f/ih (/ecrrs S/jrt^ c/ecjrs 

 Index procfucf pro(fuc/m • _ ^ro&ucA^ . .. ^.rtx/c/c/, ,,», M/=>/73K7<:/£7^r^nt 



nth 



Fig. 33. monthly variation in shape of eggs produced during a period of six 



YEARS 

 The figures in parenthesis designate the number of birds available for the respective calculations 



