MODES OF HEATING. 259 



from the plants. A novel and economical method of heating such houses, 

 and indeed most small greenhouses, would be to place on the top of a Ger- 

 man stove a small boiler, placed in the centre of the house, and having the 

 stove so constructed as to allow the smoke to escape under the floor, as 

 is the usual manner in similar stoves used for heating halls, lobbies, &c. 

 From this boiler a pipe should branch off from the right hand and another 

 from the left, and be carried to any required distance, where thev should 

 make a turn, and again enter the boiler. Such an apparatus being port- 

 able, could be removed when not required, and used for a variety of 

 domestic purposes, particularly in a laundry for drying Hnen, or a harness 

 room for repeUing damp, and a variety of other purposes that the inge- 

 nuity of the proprietor might suggest. 



Verandahs, like greenhouses, conservatories, &c., may be conveniently 

 heated, if placed over cellars, or other underground apartments, by having 

 a regular hot-water boiler placed in them, with a conducting pipe rising 

 from its top, (which of course must be a fixed one), which would conduct 

 the hot water into a horizontal pipe, placed in a cavity under the floor, 

 and extending to the end of the house, and either made to return under 

 itself, or to make the circuit of the house, and again re-enter the boiler 

 near its bottom. It is of no consequence how deep the cellar may be, 

 or how high above it the house to be heated may be placed. However, 

 that as little waste of caloric as possible may take place, we should re- 

 commend the perpendicular pipe to be covered with coarse canvass or 

 sacking, or any other non-conducting substance. 



Neither is it essentially necessary that the boiler be placed directly under 

 the verandah, &c., for if the pipes be covered as above, or enclosed in 

 a wooden case and packed in saw-dust, they may be carried a consider- 

 able distance in a slanting, or even horizontal position, so long as they 

 are kept above the level of the boiler. 



Many dwelling houses are now heated by means of hot water, the 

 boiler, &c. being placed in the cellar, or in a chamber constructed on 

 purpose, a niche in the side of a passage, or any other more convenient 

 place : when such is the case, a branch pipe may be readily conducted to 

 the verandah, and the supply of hot water cut off or let on by means of 

 Kewley's water-cock, as may be required. 



Such we consider to be the perfection of the principle of heating plant 

 structures of this description. 



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