152 



HABITS OF BIRDS. 



Transverse section and elevation of an Egyptian Egg-oven. 



one days, the same time as when eggs are naturally 

 hatched by a hen: About the middle of this period, 

 a number of the eggs in the lower are moved into 

 the upper rooms, in order to give the -embryos 

 greater facility in making their exit from the shell 

 than they would have if a number of eggs were 

 piled up above them. 



Transverse section and perspective elevation of an Egyptian 

 Egg-oven. 



The number of ovens dispersed in the several 

 districts of Egypt has been estimated at 386 ; and 

 this number can never be either increased or di- 

 minished without the circumstance being known, 

 as it is indispensable for each mamal to be managed 

 by a Bermean, none of whom are permitted to 

 practise their art without a certified license from the 

 Aga of Berme, who receives ten crowns for each 



