2-fc DESCRIPTION OF A STOVE. 



VI. 



Defcription of a Stove on the Principles of the Sivedijh Fire-place t 

 with Heat-opt nings, by Citizen Guytqn.* 



Fire-places in ■*• HE true principles of eonftructing fire-places, fo as to ol> 



France not gene, tain the greateft heat with the leaft confumption of fuel, have 

 rally conftrucled , . to _ _ 1 . ^ , " , , . 



on good princi- been known for tome time in France; but they have been 



P les « much lefs generally adopted, than the neceffity for economifing 



Often too deep, fuel demands. We fee many fire-places fo deep as to con- 

 fume double the quantity of fuel neceffary, and yet heat the 

 apartment but faintly, where half the expence might be fpared 

 by altering the fire-place according to count Rumford's plan. 

 Smoky chim- If a chimney fmoke, inflead of reducing the tunnel to pro- 



"y^emedied." " P er dimenfions, fo that defcending currents cannot take place 

 in it, fcarcely any remedy is thought of but air-holes, which 

 require the facrifice of a certain quantity of fuel,, to counter- 

 balance the effect of the cold air continually entering. 



The ufe of the Swedifh ftoves is probably yet rare, from 

 their not having been conftru&ed on juft principles, or in the 

 beft proportions, at their firft introduction. As I have had 

 one made, which appears to many of my friends to produce 

 an aftonifhing effect, in compliance with their, requeft I flia.ll 

 give an exa6l defcription of it, premising however a few prin- 

 ciples with regard to fires. 

 General princi- l. The heat produced is proportionate only to the air con- 

 rLttr^^bythefuel. 



jneftic purpofes, 2. The quantity of heat produced by a given quantity of 

 fuel is greateft when the combuftion is moft complete. 



3. The combuftion is molt complete when the filiginous 

 part of the fuel is retained longed in pipes in which it may 

 undergo a fecond combuftion. 



4. Of the heat produced none is of ufe, but what is dif- 

 fufed through the fpace to be heated, and retained in this 

 fpace. 



5. The temperature in this fpace will be higher, in propor- 

 tion as the current of air, which is to renew and keep up the 

 combuftion, is lefs difpofed to abforb the heat of this fpace in 

 palling through it. 



* Abridged from the Annales de Chimic, vol. xli. p. 79. C. 



Hence 



