BROILERS AND ROASTERS. 



39 



Incubator Cellar in Curve of a Bank. 



cult, if not impossible. Probably, neither in case of the- 

 two cellars illustrated, nor in that of most of many others 

 which, like them in general, but differing in slight particu- 

 lars, might be illustrated, was there any careful and expert 

 study and decision of the possible effects of slight devia- 

 tions from other plans. As in all kinds of buildings, many 

 minor features depend upon an undemonstrated idea, or 

 even a mere whim of the builder, and no marked influ- 

 ence either for good or bad is traceable to these features. 



The advantage of a room partly underground is that the 

 temperature in it changes slowly and rarely reaches the 

 extremes of either heat or cold which may prevail outside. 

 It can make little material difference in this respect, 

 whether the walls are banked half way up or a little more, 

 or not evenly banked all around — provided there is not a 

 large wall surface close to the incubators so exposed to 



