310 



A DEVICE FOR REGULATING TEMPERATURE 



pipette A which is so adjusted that, when the circuit closes and the 

 armature of the relay is pulled over, the water flows into a funnel B 



no V 



Circuit 



Fig. 1. Device for regulating the temperature of incubators. 



placed near the opening C in the incubator jacket and thence to 

 waste. When the circuit is broken the water flows into the incubator 

 and so raises its temperature. The overflow from the incubator 



