INHERITANCE OF FECUNDITY 205 



B. With 4 9 9 indicated to be of class 6 = JhLi . Fhh. 



9 Proqeny 



Winter Production: Over SO Under 30 Zero 



Observed 2 6 3 



Expected 2.75 5.5 2.75 



Mean winter production of 9 9 



in indicated class 75.00 eggs 7.33 eggs eggs 



C. With 4 9 9 indicated to be of class 1 = /L1L2 . FhU. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 5^ 6§ 1 



Expected 4.5 6.5 1.6 



Mean winter production of 9 9 



in indicated class 44.60, eggs 8.00 eggs eggs 



D. With 3 9 9 indicated to be of class 4 = fLdz • FLxU. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 3 3 



Expected 3 3 



Mean winter egg production of 



9 9 in indicated class 45.33 eggs . 7.33 eggs eggs 



All 9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 12| 15^ 4 



Expected 11.65 16 4.35 



Mean winter production 53.58 eggs 7.60 eggs eggs 



The agreement between observation and expectation is plainly 

 very close here. The three fecundity classes are represented and 

 in proportions as near to those indicated by hypothesis as could 

 be expected, considering the numbers involved, 



B.P.R. (f 566. Indicated constitution = /L1L2 . fhh. 



This bird was used in the breeding pen in the season of 1910, 

 having been hatched in the spring of the previous year. His 

 sire was d' D556, a class 4 male to be taken up later, and his dam 

 a class 2 female. His breeding history was as follows: 



