A Pine Pit heated by Steam. 



400 



Fire place. 



Flue. 



Boiler. 



Steam chamber. 



Holes to admit the steam into the house : 



they are stopped by plugs when the steam 



is not wanted. 



Hole to allow the steam to escape when 



not in use. 



Ball-cock cistern. 



Trap-door into the stock hole. 



Arched passage into the chamber. 



Door. 



I am, Sir, yours, &c. 



Andrew Johnston 



Shugborougk Gardens, 

 August 5. 1826. 



