192 RAYMOND PEARL 



Matings: A. With 6 9 9 indicated to be of class 1 = /L1L2 . FUh. 



9 Progeny 



Winter Production: ' Over 30 Under 30 Zero 



Observed 9 10 2 



Expected 10.5 10.5 



Mean winter production of 9 9 



in indicated class 64.44 eggs 19.80 eggs eggs 



B. With 399 indicated to be of class 3 = fUU . FUh. 



9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 2 2 



Expected 2 2 



Mean winter production of 9 9 



in indicated class 54.50 eggs 26.50 eggs 



C. With 1 9 indicated to be of class 6 = fhLi . Fldi. 



f 9 Progeny 



Winter Production: Over SO Under 30 Zero 



Observed 2 



Expected 2 



Mean winter production of 9 9 



in indicated class ... 4.00 eggs 



All 9 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed , 11 14 2 



Expected 12.5 14.5 



Mean winter production 62.64 eggs 18.85 eggs eggs 



The families are small in this case. From both these pure 

 Barred Rock and the cross matings in which cf 564 entered, how- 

 ever, there can be ho doubt that he is a class 7 male. The two 

 zero birds are to be reckoned as ' somatic zeros' rather than game- 

 tic. Both began laying at the very beginning of the spring period, 

 and made records which indicated to one familiar with this 

 sort of material that they belonged genetically in the 'Under 

 30' class and only by accident failed to lay some eggs during the 

 winter period. 



