ANATO:\IY OF THE FOWL 



45 



The yolk is of less specific gravity than the albumen, hence 

 it gradually rises Avith the blastoderm uppermost ; if allowed to 

 remain, the blastoderm may become adherent to the egg mem- 

 brane and cause death of the embryo, hence the necessity of 

 turning- the egg kept for hatching and during the first eight- 

 een days of iiiciibation. 



There is just as high a production of eggs from an indi- 



' •''*!B:*)a.>^-ffK- 



Fig. 14. Section of Ovary of the Hen. 

 a, undeveloped ova showing- their nuclei; b, one in which deposit of volk has 

 begun; c, a section through the center- showing the germinal vesicle. 



vidual without the service of a male as with such service. 

 In other words, the spermatozoa have no influence on the rate 

 and number of the development of eggs. 



The egg as laid consists of an outer shell coating giving it a 

 gloss or so-called bloom, which may be considered as a pro- 



