Fig. 6 shows the shell parted and the chick 

 ready to come forth. 



As the yelk is the principal nourishment of the 

 chick during incubation, it is desirable that the egg 

 be perfectly fresh as well as well fertilized. The 

 last part of the yelk absorbed is food for the chick 

 for from twenty-four to thirty-six hours after 

 hatching. 



Stale eggs, though fertile, will not make hardy 

 chicks ; if they do hatch, the percentage will be 

 small. 



Break a few eggs that are not fresh, on a plate, 

 and you will notice that in most of them the sac 

 which confines the yelk will break and allow the 

 yelk to mix with the white. A few which, being 

 very carefully broken, retain the sac unbroken, 

 50 



