inheeitance; op fecundity in dome;stic fowl. 319 



B. With 3 ? ? indicated to be of class 2 =1: fkLz. Fhh- 



$ Progeny 



Winter Production: Over 30 Under jo Zero 



Observed 8 o o 



Expected 8 



Mean winter production of 5 ? 



in indicated class . . . ' SQ.oo eggs 



C. With 2 2 ? indicated to be of class 6 = fkU. Pkk- 



$ Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed o 3 



Expected s , 



Mean winter production of ? ? 



in indicated class 20.33 eggs 



All 2 Progeny 



Winter Production: Over 30 Under 30 Zero 



Observed 20 15 i 



Expected 20.5 13.5 o 



Mean winter poduction 52.20 eggs 16.53 eggs o eggs' 



Barring the single bird with a zero record the agreement be- 

 tween observation and expectation here is perfect. This excep- 

 tion was a late" hatched bird (June 2, 1910). It laid an egg on 

 May I, 191 1, of its pullet year, and died from a combination of 

 pulmonary and intestinal difficulties on May 22. Under these 

 circumstances it obviously carries little weight as an exception 

 to expectation on a gametic basis. 



B.P.R. $ ^64. Indicated constitution = fUhi. fULi. 

 This bird was hatched in 1909 and used in the breeding 

 season of 1910, with the following results: 



" It must always be remembered that 'late' is relative. Under our 

 conditions of climate, etc., at Orono, June 2 represents very late hatch- 

 ing for birds which are to be used in fecundity work. The cold weather 

 comes on so early in the fall and is so severe that any bird not fully 

 developed by the middle of October or the first of November at the 

 latest is likely to remain permanently stunted. The first of June repre- 

 sents about the latest possible limit of hatching for fecundity work 

 tinder these conditions. 



