40 



General Notices. 



Fig. 5. is a perspective view of the stove with its case ; ^g. 6. a view of the 

 stove or fireplace with the case removed ; ^g. 7. a section showing its con- 

 struction. The arrows mark the direction of the smoke in the descending 

 flue, a is the smoke-pipe that enters the chimney (m) at the bottom, which 

 may in ordinary cases be closed by an iron plate (/). The sraoke-pipe enters 

 through the bottom plate of the stove (b), in which is a groove (k k) filled 

 with sand to receive the bottom of the outside case, c c is a conical piece with a 

 ledge to receive the cylindrical trunk (d d) which forms the fireplace ; c a plate 

 forming the bottom of the ashpit and part of the flue ; / a plate which forms 

 the back of the fireplace, and also part of the flue ; g the fire-grate ; h the 

 ashpit ; j the cover of the stove, half of which turns on a centre, and may be 

 left more or less open, and by which, also, the fuel is introduced, i is the 

 valve by which air is admitted to the stove, when the outside case is in use. 

 Now, it will be observed, when the outside case is on, no air can come at the 

 fire but what is admitted through the valve (i), and the rate of combustion will 

 be accordingly; also, by partially opening the top (j) of the fireplace, a con- 

 siderable quantity of the air admitted into the case will descend through the 

 flue, without coming in contact with the burning fuel. The heat thus com- 

 municated to the outside case may be very moderate, while a sufficiently high 

 temperature may be maintained in the inside stove, and also in the chimney, 

 to insure an ascending current that will completely carry away all the noxious 

 products of the combustion. It will be clearly seen, that the principle of this 

 stove consists in enclosing the body of the fireplace with an air-tight case 

 much larger than the fireplace itself, removable at pleasure, and not in con- 

 tact or connected with it : so it will be of no consequence in what form the 

 inside stove is made, but it may, by modifying its form, be rendered subservient 

 to many domestic and useful purposes. — William Kirhiuood. Edinburgh, July, 

 1839. 



White's Patent Stoves. — A printed notice respecting these stoves has been 



