CltOM AVOOD AND eo U 9 



A description of the apparatus, plan <>i' the experiments, 

 and the manner of experimenting, will now be detailed. 



In a room with a floor of about eleven feel by fourteen, and 

 nine and a half feet in height, another room is constructed. 

 eight feet square in the clear, its contents being ">1 1 cubic feet 

 The plate represents the interior of this room in perspective, 

 and as these rooms may now be considered as distinct, 1 shall. 

 for convenience, designate them by the name- of interior and 

 < .rh riot: 



The frame of the interior room is composed of scantling. 

 three inches hy four. The ends of the posts, and top and bottom 

 rails, have mortises, with tenons passing through them, of suffi- 

 cient length to project about four inches, ami. in the projecting 

 part of the tenons, are transverse mortises for wedges, by w bich 

 the frame is drawn firmly together. The floor is supported 

 by two cross pieces of scantling, and the posts and rails are 

 grooved through the centre, to receive hoards one inch in Un- 

 clear, with which the room is enclosed. The boards are also 

 grooved together in the most perfect manner, so that the 

 wedges (there being no nails used except about the door and 

 window) will draw every part of the room tight, and correct, 

 with great facility, any shrinking of the boards during the 

 process of seasoning, which it was necessary to perfect, pre- 

 vious to any experiments being made. 



The interior is supported by it» four posts, sis inch* - from 

 the floor of the exterior room, there being the same distance 

 between the ceilings, and a much greater between the side 

 walls, the air therefore circulates freely between the two rooms. 

 The internal surfaces of the interior room are made a> white 

 as possible with time-wash, to produce equality in their power 

 of conducting heat. The body of the stove, Fig. I., is a cylin- 

 der, twelve inches iii height, and l" 1 " - inches diameter; the 

 ash pit is lour inches deep, and lour inches in diameter; both 

 are made of common sheet iron, and separate, for the purp 

 of introducing between them, a chamber, or concave piece "i 

 sheet iron, of larger dimensions, perforated with holes hall an 

 inch in diameter: and on ibis chamber the bodj of th< 8WV< 

 I or., in. — ( 



