THE HATCHING EGG 



107 



consequently their eggs are infertile. Extremely small eggs 

 are usually the first or the last of a clutch, and will produce 



A normal eqcj 

 both ay to siz<? 

 and shB.j>& 



L An <?gg Wbicli 



1 is loo smaR 



for hatching 



An Ggg loo largp 

 for hatching; il is 

 apl lo be ml orlile 



Abnormal ogg; 



usqIgss lor hatching 



Fig. 62. — Normal and abnormal eggs for hatching. 



only small chicks of low vitality. Eggs of medium size, 

 weighing about two ounces, are the best. The shells of eggs 



