Effect of Lead on Germ Cells. 



o 

 o 



z 

 5 

 o 



X 



o 

 w 

 hJ 



Q 

 W 

 Z 

 O 



ifl 



o 



Cm 



z 



c 



pa 

 o 

 w 



H 



a 



O 



a 

 fa 



H 



w 



Pi 



Per Cent. 

 Cross-breds 

 Dead in 3 

 Wks. 



OOO 

 odd 



O 



d 



Cross-breds 

 Dead in 

 3 Wks. 



OOO 



0 



Per Cent. 

 Leghorns 

 Dead in 3 

 Wks. 



" no 



t-t 



Leghorns 

 Dead in 

 3 Wks. 



N CO O 



1/1 



Chicks Hatched. 



Per Cent. 

 Leghorns. 



<r> *d *o 

 t> r~ " 



^t - 

 ii 

 0 



Cross-bred. 





10 



Leghorn. 





M 



ro 



Identified. 



Cross-bred. 



0 1-1 0 





Leghorn. 



W * M 



O 



Dead 

 Em- 

 bryos. 



0 t- 



r~ 



Per Cent. 

 Eggs In- 

 fertile. 



10 



06 ro t-i 





Infertile 

 Eggs. 



00 <N O 





2 si 



0 bfl 

 HW 



t-» *o O 



O 

 0 



Hen No. 



O ro t— 

 00 00 \rt 



< 



Totals. . . 



