No. 614] 



EGG PRODUCTION 



75 



ing of the individual birds covers a period of five week?. 

 The records are to be read as follows : The number in the 

 upper left-hand corner is the hen's number. The ver- 

 tical mark in each square indicates that an egg was pro- 

 duced on that day. The totals are given for each month 

 while the figure at the extreme right of the row headed 



"February" is the total number of eggs for the winter 

 period. The records for March and April have also been 

 included in order to show the type of record made by 

 birds that begin to lay very late in the season. These 

 records show clearly that no sharp dividing line exists in 

 the number of eggs laid. On the contrary, it is clear that 

 birds hatched at the same time begin to lay at widely dif- 

 ferent dates and that in consequence differences in egg 

 yield for the winter period result. That this result is of 

 general applicability to our flocks is shown by the fair 



s In calculating the C.V.*> for the data given in Figs l^and 2, the 

 of the range of Fig. 1. 



