66 



THE PRACTICAL POULTRY KEEPER. 



regulator capsule s, lying on a little shelf fixed above the 

 eggs, under the tank. A rod, o, presses on the top plate of 

 the capsule, and is carried up to p, very near the pivot end 

 of the lever G, where there is an adjusting screw, P ; there is 

 also on the lever a small sliding weight, H. By this screw 

 and weight the temperature is adjusted ; and when this is 



Fig. 17. Hearson's Champion Incubator. 



exceeded the damper F is raised and the heat decreased. 

 Ordinarily the damper " plays " a little above the top of the 

 chimney. 



With regard to the other arrangements, the incubator is 

 packed around with non-conducting material, M. The 

 movable egg tray, B B, has a concave bottom of perforated 

 zinc, on which the eggs lie ; this concavity is to bring the 

 outer eggs nearer the tank, to compensate for the somewhat 

 less heat at the edges. The tray rests on strips of wood, 

 K K, which are wider one way than the other, by which the 

 tray can be raised or lowered somewhat, according to the 

 average size of the eggs. Ventilation holes, E E, are pro- 



