Improved Stove for Heating Rooriis, ^-c. 21 T 



reath ihe fire at F, fig. 9. Havinc; supplied the fire with 

 oxygen, it passes throutih- the flue with the smoke, aiid 

 escapes at D, heating in its protracted course the chambers 

 and air-flues. 



As the cold air enters the stove at A, immediately above 

 a plate forming the top of the fire-place, and pursues a 

 similar route with the fire-flue, it enters the chambers very 

 much heated' and rarefied. Hence any moist substance 

 placed in the chambers evaporates in consequence, not only 

 of the heated flues circulating round them, but of a stream 

 of warm rarefied air, which, while it continually raises eva- 

 poration, as continually bears away the exhaled moisture in 

 its passage to the fire, thus imitating the gradual and effica- 

 cious plan of nature in drving by the sun and air. While 

 these eflfects are taking place within the stove, part of the 

 air which enters at A. fig. 1 and 2, passes through air-flues 

 on the other side of the fire-flue, pursues a parallel course 

 with the first, and gives out a current of wariu air to the 

 room at an aperture H. This eff"ect mav be obtained in a 

 much higher degree, if the doors of the chambers and ash- 

 holtf are opened : should the hand or face be then brought 

 near, they would be famied with a stream of warm air, espe- 

 cially from the upper chamber. 



By means of this stove I have evaporated railk to dryness, 

 without burning or discolouring it : and have dried cherries, 

 plums, and other fruits, so as to imitate those which are re- 

 ceived from abroad. I have repeatedly dried colours and the 

 most delicate substances without the slightt'st injury to them, 

 even thou<ih tiie operation proceeded quicklv. 



The height of the stove is atjout 5^ feet ; its diameter 2^ 

 fcet, and that of the fluf s 4 niches. The external part is 

 constructed of brick, and the internal parts of thm Rvearale 

 or fire-stone, except the top of the fire-place, v.hich is a 

 plate of cast iron. Were it to be wholly formed of iron, its 

 effects would necessarily be more powerlul. 



Fitr. 3. represents an extension of ihe^plan, in which 

 stoves of thi-< kind may be advantatfcouslv com^ected with 

 one or more furnaces for chemical or other uses. The fire- 

 place, brought out, either in front or on one side, by the 



present 



