198 RAYMOND PEARL 



B.P.R. d" DSL Indicated constitution = fliLo . fkL,,. 



This rather remarkable bird was used as a breeder for three 

 successive years, and then retired merely because no more of his 

 progeny were needed, and not for any evident diminution of 

 vigor on his part. This bird was first bred as a cockerel in the 

 spring of 1908 (hatched in 1907). All that was known of his 

 ancestry was that he was the son of a hen that had laid 200 or 

 more eggs in her pullet year. Some notion of the vigor of d" 

 D31 as a breeder may be gained from the fact that, taking all 

 three seasons together and including all parts of the breeding 

 season in each year, 89.4 per cent of all the eggs laid by hens mated 

 with him were fertile. This is an extraordinarily high record, 

 considering all the circumstances, and particularly the seasonal 

 and housing conditions. So far as concerns adult daughters the 

 breeding history of this bird is as follows : 



Matings: A. With 9 9 9 indicated to be of class 1 = JLiLi . Fhk. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed m lU 



Expected....- 11 11 



Mean winter production of 9 9 



in indicated class 48.40 eggs 15.73 eggs 



B. With 8 9 9 indicated to be of class 2 = /L1L2 . FLih. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 27| 2^ 



Expected 30 ^ . 



Mean winter production of 9 9 ' , 



in indicated class 54.96 eggs 17.00 eggs 



C. With 8 9 9 indicated to be of class 3 = j'Lih . Fhh. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 14 15 1 



Expected 15 15 



Mean winter production of 9 9 



in indicated class 41 .93 eggs 12.20 eggs eggs 



