326 On a Steaming Apparatus. 



ment, that it will continue to absorb the heat of a moderate 

 fire during months, without ever being hot itself, or materially 

 raising the temperature of the house : though the air enter 

 at a very high, and go out at a low* temperature, and more 

 heat disappear than would be sufficient to burn the plants, 

 if the heated air were made to pass through a tube of cast 

 iron. 



