110 MASS. EXPERIMENT STATION BULLETIN 211, 



912-13 



913-14 



914-15 



1915-16 



1916-17 



917-18 



918-19 



_ 1919-20 



^ 1920-21 



555 7 55 



EGOS 



13 5 5 



Fig. 6. — Integral Curves showing the Percentage of Each Flock having a Winter Egg 



Production as Great as that indicated, or Greater. 



No allowance made for November in 1912. (See Table II.) 



_ 1913-14 

 .. 1915-16 

 _ 1918-19 

 .^ 1920-21 



15 



H 



^ 



^ 



\ 



FlQ. 



105.5 



7. — Frequency Polygons showing the Percentages of Flocks having Winter Pro- 

 duction indicated. 

 1920-21 curve is for the original high line only. 



