CHANGES IN EGG PRODUCTION. 



119 



913-14 

 9I4-'15 

 1915-16 

 I916-'I7 

 1917-16 

 1918-19 

 1919-20 

 1920-21 



DAYS 



FiQ. 14. — Integral Curves showing the Percentage of Each Flock beginning to lay at or- 



before the Ages indicated. 



One exceptionally old bird is omitted from 1915-16, and one from 1920-21. 



25 



I9I3-I1 



\9l5-ie 



_ (9I6-I9 



^ 1920-21 



DAYS 



Fia. 15. — Frequency Polygons showing Percentages of Flocka beginning to lay at Ages 



indicated. 



