Practice. 93 



warm from the temperature already acquired 

 by the stoves. On the day on which they 

 cease to hght the fires, part of the eggs of 

 each inferior room are always conveyed into 

 the room above. The eggs had been too 

 much heaped in the former, and it is now 

 time to extend and give them more room. 

 It is a task sufficiently hard for the chick 

 about to be hatched to break and deliver 

 itself from the shell, but it would be im- 

 possible for it to lift any additional weight. 



The proper number of eggs from each 

 inferior room, having been removed into 

 the room above, all the apertures of the 

 rooms and of the gallery, are closely and 

 exactly stopped with bungs of tow, except- 

 ing perhaps half the apertures in the arches 

 or ceiUngs of the upper rooms, which are 

 left open in order to procure there a circu- 

 lation of air. This precaution is sufficient 

 to preserve in the ovens, for many days to- 

 gether, the temperature which has been 

 obtained; which indeed would be the case 

 with ovens upon so considerable a scale in 

 any country, more especially in one so hot 



