No. 628] 



EGG-WEIGHT 



387 



V 



In view of this correlation between numerical produc- 

 tion and percentage ot increase m egg-weiglit when meas- 

 ured at the period of the vernal maximum, it appeared 

 desirable to ascertain whether a similar correlation ex- 

 isted between production and increase m egg-weight 

 manifested at the autumnal (September) maximum. The 

 same two dcmoiist i-.it loiml methods used m the previous 

 instance i.iav 1,.. a])i.lie<l. 



The dala on piiHlnctioii were first re-distributed m 

 such a manner as to ui 'uip the ])(M-centages ot increase or 

 of decrease m egu-wciulii under two headings: (1) hens 

 having an individual annual pi-oduetion greater than the 

 mean (120 eggs), and (i!) liens having an individual 

 annual proportion ot less than the mean production of 

 the entire flock. In this wav it was brought out that the 

 plus group. With a mean production of 151 eggs, showed 

 a mean net increase m egg-weight for September of 5.8 

 per cent., wliih^ the ininns irroup with a mean production 

 of 105 egus sh()\V(Ml n mean net increase of onlv one per 

 cent. 



