498 



POULTRY PRODUCTION 



only indirectly, if at all, to the increased consumption of 

 green feed.' 



Checks.— Checks are cracked eggs. Those in which the 

 crack is small and the contents of the egg is still retained 

 are called "blind checks." Where the contents is escai)ing 



Fig. 241 



/ 



Fertile et;y allowed to die alter tseventy-tvvo hours of incubation, showing a 

 pronounced blood ring. (Courtesy of Bureau of Animal Industry.) 



they are tlesignated as "leakers." Such eggs may be per- 

 fectly sweet and wholesome, but are extremely perishable, 

 and are good f(jr immediate consumption or to be broken out 

 and dried or frozen. 



' The pigment-forming organism has been isolated by the Bureau of 

 Chemistry, U. S, Dept. of Agriculture. 



