190 RAYMOND PEARL 



C. With 3 9 9 indicated to be of class 3 = fLJ. ■ FUh. 



9 Progeny 



Winter Production: Over 30 ' Under 30 



Observed 2 1 



Expected 1 .5 1 .5 



Mean winter production of 9 9 



in indicated class 35.50 eggs 22.00 eggs 



All 9 Progeny 



Winter Production: Over 30 Under 30 



Observed 30^ 16| 



Expected 30.5 18.5 



Mean winter production 51 .07 eggs 13.06 eggs 



Zero 







Zero 

 2 

 

 



In this case the two zero birds are without much question to 

 be reckoned as somatic rather than genetic zeros. Unfortunately 

 neither of these birds were bred, so that precise information on the 

 point is lacking. Assuming this to be the case the agreement 

 between observation and expectation in the large progeny is 

 perfect. The matings under C got so few 9 progeny as to be 

 without significance one way or the other. 



The mean winter productions again show the distinctness of 

 the separation between the 'Over 30' and 'Under 30' fecundity 

 classes. 



B.P.R. d' 554' Indicated constitution = fhLo . fkLo. 



This bird, hke cf 552 was used in the breeding pens two years. 

 He was hatched in 1908 and bred in each of the two following 

 years. His breeding history was as follows: 



Matings: A. With 8 9 9 indicated to be of class 1 = fLiLi . Fhli. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 12 12 1 



Expected 12.5 12.5 



Mean winter production of 9 9 



in indicated class 47.67 eggs 15.58 eggs eggs 



