No. 586] SELECTION OE A CHARACTER 



and of the gametic constitution of particular individuals 

 with reference to that character. As a matter of fact, all 

 low-producing lines were dropped at the end of the laying- 

 year 1911-12. Certain of the mediocre lines were contin- 

 ued a year longer. In the laying flock of 1913-14 there 

 were no birds which had been bred for anything other 

 than high production, so far as the breeder's deliberate 

 intention went. 



II 



The results of this seventeen ; 

 set forth in Table I. 



TABLE I 



selection period i 



I'M.-, I'.Mll 



904-1905 

 '.in:. \Wi\ 

 9ini HKiT 



1912-1913 

 19K5-1914 

 1914-191.-, 

 Totals and 



The data of this table are shown graphically in Fig. 1. 

 From the table and diagrams the following results 

 appear : 



1. The number of individuals involved in this experiment, 

 on each one of which exact trap-nest records have been 

 kept, is large, amounting nearly to five thousand. This 

 number is large enough to lead to conclusions which are 

 trustworthy. It will be shown presently that wherever 

 it has been possible to compare the results on egg produc- 



