206 RAYMOND PEARL 



Matings: A. With 5 9 9 indicated to be of class 1 = JL1L2 . Fhh. 



9 Proaeny 



Winter Production: Over 30 Under 30 Zero 



Observed 4 8 2 



Expected 5.2 7 1.8 



Mean winter egg production of 



9 9 in indicated class 35.00 eggs 20.50 eggs eggs 



B. With 6 9 9 indicated to be of class 2 = /L1L2 . FLih. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 9 6 



Expected 7.5 7.6 



Mean winter eggs production of 



9 9 in indicated class 50.44 eggs 11,83 eggs eggs 



All 9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 13 14 2 



Expected 12.7 U.5 1.8 



Mean winter production 45.69 eggs 16.79 eggs eggs 



Here again the agreement between observation and expecta- 

 tion is very close, quite as close as could be expected with the 

 numbers involved. The mean production of the 4 birds in' the 

 'Over 30' class in the A matings is low. 



B.P.R. d" D35. Indicated constitution = fLiLs . fhU. 



This bird was one of the original males with which the present 

 breeding experiments were started in 1908. The only thing 

 known about his ancestry is that he was the son of a hen laying 

 200 or more eggs in the year. He got only a small adult female 

 progeny, and was used as a breeder only one year. His breeding 

 record follows. 



Matings: A. With 4 9 9 indicated to be of class 1 = JL1L2 . Flih 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 3 5 1 



Expected 3.4 4.5 1.1 



Mean winter production of 9 9 



in indicated class 58.67 eggs 15.20 eggs eggs 



