370 Maine; agricultural experiment station. 1912. 



2 Progeny 



Mating 



Observed Winter Production^op Daughters 



B. P. R. c? 



Barred Fi? 



Over 30 Under 30 



i 



Zero 



566 



419 



2 



3 



1 



Expected 



Mean winter production 



2.25 

 46 . 50 eggs 



3 

 13.67 eggs 



0.75 

 eggs 



While this single family is small the three classes expecteil 

 are represented and in as near the right proportion as could be 

 expected. 



Putting together all the results for B.P.R. ^ 5 X L'arred A 

 5 5 we get : 



? Progeny 

 Unmodified Data 



Over so Under 30 Zero 



2li 16* 4 



20.23 21 0.73 



Winter Production . 



Observed 



Expected 



Data modified in accordance with physiological facts regarding indi- 

 vidual birds 



Winter Production. 



Observed 



Expected 



Over 30 Under 30 Zero 

 19 J 2oi 2 



20.25 21 0.75 



Matings of Barred Plymouth Rock males and h\ Black fe- 

 males. A number of matings of this type were made, represent- 

 ing several different gametic combinations. The following 

 B.P.R. males were used in these matings. The class and gam- 

 etic constitution given are those which have been brought out 

 by the pure B.P.R. matings. 



Bird No. 



Class (Table 5) 



Gametic Constitution 



552 

 554 

 562 



71 



7 



fhLi . fliL-> 



573 

 564 

 567 

 569 



7 

 7 

 7 

 4 



fLiU.fhh 



Of these males four, namely 552, 554, 573 and 564, were 

 mated with females whose sire was C.I.G. S 557. These birds 



