104 



J. Thomas Patterson. 



ttie difference between any two succeeding days is sometimes exactly 



one hour (hen 1). 



Hen 1. 



Laid April 1, 8 :30 a.m. 



" 2, 9:30 " 



" 3, 10:30 " 



" 4, 11:30 " 



" 5, 12:30 " 



When a hen is not laying daily the matter of determining the 

 time is not so simple, and yet even here one can approximately pre- 

 dict the exact time of the laying, as can be demonstrated in the 



following case: 



Hen 2. 



Laid June 12, 2 :00 p.m. 



" 14, 10:00 A.M. 



" 15, 2:00 P.M. 



" 17, 10:00 A.M. 



It is evident from these data that the hen was laying at 10 :00 a.m. 

 and 2 :00 p.m. on succeeding days and then was missing a day. It 

 was, therefore, predicted that she would lay early in the afternoon 

 of the 18th, and since an early cleavage stage was desired, the hen 

 was killed at 4:00 p.m. on the 17th. The stage secured is shown in 

 Fig. 15. 



There are some hens that apparently do not lay at any regular in- 

 tervals, and in such it is quite impossible to predict the time of 

 laying. As an example, I may cite the following case: 



Hen 3. 



Laid July 25, 11:00 a.m. 

 " 28, 11:00 

 " 30, 11:45 

 " Aug. 1, 11:00 



6, 9:30 



7, 3:00 p.m. 

 9, 1:00 



" 11, 12:30 



" 13, 2:00 



" 16, 1:30 



" 18, 1:00 



Killed August 19, 5:00 p.m. (secured an early cleavage stage). 



