GENERAL CULTURE OF STOVE PLANTS. 
61 
with not near so good an effect. As it is necessary to employ pipes to conduct the 
effluvium, arising from the charcoal, out of the places required to be warmed, it 
will, in order to secure all the heat possible, be of importance to introduce a suffi- 
cient length to allow the whole heat to pass off, before the ends of the pipes are 
turned to the outside. 
In order to make the smoke conductors suitable for any situation, it is only 
necessary, in addition to the elbow pipes, to be provided with several lengths of 
straight pipes ; placing one elbow upon the permanent smoke conductor, connected 
with the fire, and the other at the extremity, or midway of the piping, as it may 
be required. 
The larger sized apparatus could not well be more than eight feet long ; for if 
arger, it would be inconvenient to move about. The size of the one which appears 
most useful is as follows :-The whole height of the centre portion of the apparatus, 
comprising the boiler, &c., is fifteen inches, and width five inches and a quarter, by 
seven and a half inches ; the fire-pan is five inches and three-quarters, by four and 
a half inches, and three inches and a half deep ; surrounded on three sides by a 
boiler half an inch in diameter, which becomes more spacious upwards, as the fire- 
place diminishes. 
The opening necessary for the reception of the fire-pan, and for supplying it 
with fuel, is six inches wide, by five and a half deep ; at the top of the opening the 
fire-place commences tapering ; consequently the water in the boiler expands more 
immediately over the fire ; the smoke pipe takes its regular width, one and a half 
inch in the boiler, about an inch below where the lid unites 3 the horizontal water 
pipes (a) are each twenty-eight inches long, by two inches diameter; the end pipes 
(6) are fourteen inches and a quarter by three inches diameter; a feeder (c) is 
added, in case it should be thought better to have the lid fixed tight on the boiler. 
In order to promote the circulation of the water, small holes are to be perforated 
in the tops of the lids {d, d,) which are also intended to be fixed tight. The appa- 
ratus may either be placed on the floor of the place to be warmed, or raised by 
