Study of Selections fob Size, Shape, and Color of Hens' Eggs 257 



It should be noted that the individuals whose data are used for the 

 later months of the year, shown in figures 28, 29, and 30, are those that 

 laid during the longest period and were very likely to be the highest pro- 

 ducers (Rice, 1914). This would indicate an agreement with Curtis 



Grams 



3/m/s n^/r/? //fis mec/n of 



-^S or /ess 56-60^ , . 



-^(0-50 6/-65 



5/-55 7/-75 



1:^^^ 



62- 

 58 

 S4 

 50 

 46 







h) (27) er'. (ew 



■ y i ■ 1 1 I II I 1 1 ■ ■ ■ I 1 1 1 1 



t^ 



-em 



o^J'f" 





I3iy 



""^; 



Month iBt 2d 3d 4th 5th 6th 7th 8th 9th 10th llth 



Pig. 30. monthly variation in size of eggs produced during a period of six 



YEARS 



The figures in parenthesis designate the number of birds available for the respective calculations 



The curve representing the birds having a life mean of 45 or less does not lie entirely within that range 



because the whole six-years data on which the life mean is based is not available in monthly means for 



this chart 



(1914 a) and-Hadley (1919) to the effect that the conditions causing the 

 production of a great many eggs will also cause the production of large 

 .eggs. In order to see whether the results shown in figures 28, 29, and 30 

 were due to the selection of high-producing birds from the low producers, 

 as suggested above, figure 31 was constructed for five individuals which 



