HYDRO-INCUBATION. 267 



and easily approached by the road from London. 

 It consists of a long building with several out- 

 houses, long and low structures. The central 

 building had formerly been appropriated to the 

 use of some giraffes, which were there exhibited. 

 The other parts of this 'farm' were arranged 

 specially for the benefit of its numerous feathered 

 occupants. In an apartment petitioned off from 

 the rest of the central building, the process for 

 hatching the eggs is carried on. On entering it 

 a series of long upright boxes are seen arranged 

 side by side against the wall. These are the 

 Hydro-Incubators. One of them we shall en- 

 deavour to describe. 



It consists of an upright chest, divided into three 

 compartments. In the central division the stove 

 is placed, which is supplied with charcoal, and 

 the temperature of which is carefully regulated. 

 External to this stove is a perpendicular reservoir 

 of water, which is heated by it. Pipes are con- 

 nected with this reservoir to convey the water on 

 each side of the chest into its two lateral com- 

 partments, and so to cause a constant circulation 

 of the fluid. On each side is a space for the warm 

 water at the top, the bottom of which is lined 





