216 



HEATING AS APPLIED IN HORTICULTURE. 



the top of the stove is placed a Welsh 

 tile, 2 feet square and 3 inches thick ; the 

 feeding door is about the centre, and a 

 small sliding draught and ash-pit door at 

 the bottom — the whole forming a neat 

 and unobtrusive structure. A pipe about 

 1 8 inches long leads from the stove to a 

 small chimney outside. A stove of this 

 kind requires feeding but once in eight 

 or ten hours." The advantages of this 

 stove are thus stated : the total expendi- 

 ture of material and labour is £2, 5s. ; 

 it is calculated to last for twenty years, 

 with occasionally renewing the bars at 

 the bottom of the fire-box, which can be 

 done without disturbing any part of the 

 structure ; the heat is efficient and uni- 

 form, its dryness being counteracted by 

 placing a pan of water upon the top of the 

 stove ; the draught is regular ; there is 

 no danger of bursting by over-heating ; 

 little soot is formed, as coke is used ; the 

 consumption of fuel is trifling. This 

 stove is placed within the house or pit ; 

 but in consequence of the regularity of 

 the draught, and the shortness of the 

 pipe leading to the chimney, no fear is 

 entertained by Mr Rivers of noxious 

 gases escaping ; and the dust so much 

 complained of in ordinary stoves when so 

 situated, is got rid of by saturating the 

 half-consumed coke and dust with water 

 before the fire is kindled in the morning. 

 " For heating large and lofty houses," Mr 

 Rivers, however, " presumes, at present, 

 hot water must have the preference and 

 only offers this mode to those " who wish 

 to have the pleasure of a greenhouse and 

 forcing-house at the smallest possible 

 expense — in short, for economists in gar- 

 dening, to whom the expense of heating 

 has been, and is, a great bar to the erec- 

 tion of small greenhouses." 



Allen's Archimedean stove. — Our atten- 

 tion was directed to this stove last year 

 in the Royal Polytechnic Institution. We 

 notice it as being a very ingenious appa- 

 ratus, and one which may be useful to 

 those who think more highly of hot-air 

 stoves than we do. " It is called the 

 Archimedean or screw stove, from the 

 flame or heat from the furnace, or place 

 containing the fire, being made to revolve 

 in its ascent through a spiral funnel, so 

 that it passes through a considerable 

 length of space, and in so doing conveys 

 and emits a vast degree of caloric influ- 



ence on the surrounding atmosphere. 

 There is no vapour, dust, or disagreeable 

 smell, no generation of unpleasant gases, 

 and no danger incurred. The mode of 

 feeding the furnace " — for which we prin- 

 cipally notice it — " or fire-place, is by a 

 tube, round which the screw or worm re- 

 volves, the coke or coal being put in at 

 the top, and falling into the fire-place as 

 the fuel is burnt out or consumed." — Pa- 

 tentee's description. The arrangements for 

 carrying away the smoke, and receiving 

 the debris of the fire, are simple and com- 

 plete. 



White's patent hot-air stove. — With this 

 stove we were early acquainted, being 

 consulted by Mr White upon its prin- 

 ciples some time before it was brought 

 before the public. The following descrip- 

 tion of this stove is from Mr White's own 

 prospectus : — 



" Iron is well known to be a rapid con- 

 ductor of heat, and, when much heated, 

 to have a great affinity for oxygen. The 

 fire-box of the Cockle stove, being of iron, 

 at times is liable to be red hot with a 

 strong fire ; and, on these occasions, the 

 heated air comes from it in a highly 

 offensive state. The object of Mr White's 

 patent air stove is to produce the heated 

 air free from these objections. Fig. 290 is 

 an elevation of this stove complete ; fig. 

 291 a transverse section on the line a b of 

 fig. 290 ; and fig. 292 a section on the 

 line c d of fig. 291. In fig. 292, a repre- 

 sents the fire-box ; b, aperture for supply- 

 ing fuel ; c, strong brick dampers to 

 prevent the too rapid escape of the heat, 

 and direct the flame round the internal 

 surface of the fire-box ; d smoke flue ; e 

 a regulating aperture for supplying the 

 fire with cold air; //apertures for sup- 

 plying cold air to the stove ; g g zig-zag 

 flues for heating the cold air in its ascent ; 

 and h the hot-air chamber, from whence 

 it may be taken as required. The top of 

 the fire-box is enclosed with an iron 

 plate covered with a layer of sand about 

 3 inches deep, which prevents the escape 

 of smoke, or carbonic- acid gas, in that 

 direction. In the transverse section, fig. 

 291, the tops of the zig-zag flues, g, are 

 distinctly seen, and also the position of 

 the brick dampers for impeding the 

 escape of the heat by way of the smoke 

 flue. In the management of this stove 

 but little attention is required. As a 



