Constitutional Vigor in Poultry 



597 



follow then, necessarily, that the chicks produced from eggs which hatched 

 more and heavier chicks than other eggs, will survive better. 



In the same season the mortality in pens 21 (strong) and 23 (weak) was 

 greater among the chicks in the weak pen, whereas the mortality in the 

 parent stock was greater among the hens in the strong pen. This shows 

 that the rate of mortality in the parent stock does not necessarily influence 

 the death rate in the chicks. 



TABLE 21. Chick Record 

 (December 8, 1908, to December 6, 1909) 



FINANCIAL statement 



The financial statement shown in Table 22 was computed in the same 

 way as that in Part I. Among the White Leghorns, the value of the eggs 

 produced from the strong pens and the balance profit for those pens 

 materially exceeded the record for the weak pens. It was different, 



TABLE 22. Financial Statement per Hen 

 (December 8, 1908, to December 6, 1909) 



Pen. 



Value of eggs 



Value of gain in weight . 

 Cost of loss in weight. . . 



Cost of food 



Cost of loss of stock . . . . 



Total income 



Total outgo 



Balance profit 



Summer 

 selected 



White 

 Leghorns 



Fall selected 



White 

 Leghorns 



Strong 



78 



$2.60 

 o.oi 



I. 25 

 0.02 

 2.61 

 1.27 



1-34 



Weak Strong 



79 



$2.47 



0.02 



76 



I2.SS 



1.22 

 0.06 

 2.49 

 1.28 

 I. 21 



0.03 

 1.25 



0. 16 



2.55 



1.44 



1. II 



Weak 



75 



I2.23 



0.005 



1.19 



0.08 



2.23 



1.275 



0.955 



Barred 



Plymouth 



Rocks 



True average 



Strong I Weak | Strong 



21 



$2.66 



0.03 

 1.67 

 0.33 

 2.66 

 2.03 

 0.63 



23 



I2.78 



I2.60 

 0.003 

 0.02 

 1.37 

 o. 16 

 2.603 

 1. 55 

 1. 053 



Weak 



|2.S3 

 0.006 

 0.02s 



1-34 

 0.08 

 2.536 

 1.445 

 1 .091 



Difference 



Strong Wearc 



I0.07 



0.03 

 0.08 

 0.067 

 o.ios 



$0,003 

 0.005 



0.038 



