Hatching with Incubators 141 



A glance at the picture below will show the 

 germinal disk at the top of the yolk. As the egg 



The yolk and germ in a good position. If left several 



days the germ will rise till it may lie next the 



shell and adhere. The two membranes 



within the shell are also shown 



remains on one side, the yolk slowly rises to the 

 top, until the disk is close to the shell. There it 

 soon becomes attached to the membrane, and the 



