170 EAYMOND PEARL 



One of the longest continuous egg records of an individual bird, 

 which may be considered accurate, with which I am acquainted is 

 that given by Handrik (15) (for a Leghorn). This bird was 

 hatched in 1901. Its egg record was as follows: 



Calendar year Eggs laid 



1902 105 



1903 163 



1904 138 



1905 159 



1906 160 



1907 133 



1908 Ill 



Total 969 



Average per year ; 138y 



Heier (17) gives a four-year record for a Braekel hen, which is 

 distinctly higher than would usually be obtained over so long a 

 period. The figures are as follows: 



Laying Year Eggs laid 



First 153 



Second 139 



Third 152 



Fourth 162 



Total 606 



Average per year 151| 



In this connection the paper of Dackweiler (5) is of interest. 

 Both of the cases here cited are of fowls of the Mediterranean 

 type, in whicL the tendency to accumulate body fat with advanc- 

 ing age is not marked. I know of no records comparing with 

 these in extent for Plymouth Rocks or other American or Asiatic 

 breed. After two years the fecundity of Plymouth Rocks, in all 

 cases which have been observed at the Maine Experiment Sta- 

 tion, becomes greatly reduced. 



An examination of table 4 in detail indicates that there is no 

 very close or definite relationship between the number of visible 

 number of oocytes on the ovary and the winter production of a 

 bird. Thus no. 1367 and no. 3546 each have about the same 



