INCUBATION 97 



1 IV ^ V DM. J. 1 1/iV \Ji 



method is used, the eggs that are infertile and in which 

 the germs are dead may be quickly separated from the 

 fertile ones, as the developing embryo appears as a 

 \\ \ 



FIG. 4 



dark spot in the otherwise clear white of the egg. 

 The clear eggs should be removed, as further incubation 



FIG. 5 



of them is useless. It is generally advisable to combine 

 the fertile eggs of three of four hens, placing them 



