The Essentials of Poultry Raising 



8i 



HATCH-SPOT EGG 



BEFORE THE CANDLE 



Air space : Usually enlarged. 



[Vhite : Thin and clear. 



Yolk: A distinct reddish glow 



around the germinal spot, which 



is visible; usually located above 



the middle of the egg. 

 Distinguishing characteristics : 



Reddish glow on the yolk. 



Edible. 



Occurrence : Chiefly during warm 



OUT OF THE SHELL 



White : Thin and clear ; no opales- 

 cence; does not reflect the light 

 as strongly as does a fresh egg. 



Yolk: Bears a hatch spot; is flat- 

 tened, being especially weak 

 around the embryo. 



Distinguishing characteristics : 

 Hatch spot on the yolk. 



weather or hatching season. 



STALE EGG 



OUT OF THE SHELL 



White: Thin; no opalescence; does 



not reflect the light as much as 



does a fresh egg. 

 Yolk : Flattened, and occasionally 



may have light, mottled areas. 

 Distinguishing characteristics : 



Thin, white, and flattened yolk. 



BEFORE THE CANDL'E 



Air space: Enlarged; the lower 



wall may be movable in outline. 

 White : Thin and clear. 

 Yolk : Definite in outline ; some- 

 times weak, and may occasionally 



have dark, mottled areas. 

 Distinguishing characteristics : 



Enlarged air cell and increased 



contrast between white and yolk 



as compared with a fresh egg. 



Edible. 



Occurrence: Among eggs not marketed promptly. 



189. Marketing Eggs in Clubs. It is good practice to form 

 a school club under the direction of the principal. The eggs 

 are brought to the school^ and each pupil candles his own eggs 

 and places them in the proper grade, taking home any that are 

 not first class. Many such clubs have found it possible to secure 

 from" ten to eighteen cents per dozen more than producers around 

 them who did not candle and grade their eggs and sell under a 

 guarantee. Pure-bred hens make a uniform product. 



