94 THE HOT-HOUSE. [Jan. 



Hues, which will afford an additional advantage in more effectually 

 diffusing the whole heat internally in the house, much of which 

 would be lost in the back wall were the flues attached to it: the first 

 range may be carried along the front and both ends, dipping under 

 the end door-ways and rising the other side; if there is no return 

 line to be in front, which is not necessary in a house of moderate 

 dimensions, let this Hue be carried so that the covering tiles and 

 plaster may be within three inches of the level of the front and 

 end walls, upon which a board maybe supported with bricks, to be 

 brought on an exact level with the front wall, for the convenience of 

 placing thereon a number of pots of strawberries, for forcing, or any 

 other small plants; and, moreover, the flue being carried near the 

 glasses, the heat will be particularly efficacious in repelling the cold 

 external air, frost, damps, &c, and also in distributing the heat more 

 equally to all parts of the house: for the several returns in the 

 back wall will counterbalance the strong heat discharged by this 

 first range where most wanted. 



The first range being continued round the front and ends, must 

 then be caried along the back wall in four or six returns, which 

 will be sufficient to expend all the heat before its discharge into the 

 chimney, which must be carried up immediately from the end of 

 the uppermost or last flue, either in or outside of the back wall, so 

 as not to appear in the inside of the house, and particularly in the 

 opposite end of the fire-place. 



The under range of flues immediately communicating with the 

 fire ought to be four bricks on edge deep, that they may not be too 

 soon stopped with the soot, and all the flues eight inches in the clear 

 and covered with broad tiles; the several returns may be made three 

 bricks on edge deep; and in the beginning of the first bottom flue 

 you may have a slidingiron regulator, to use occasionally in admit- 

 ting more or less heat, as it may seem necessary; being very 

 careful as you proceed that the brick work of each flue be care- 

 fully jointed with the best mortar for that purpose, and well pointed 

 within that no smoke can get out, having each return closely 

 covered with broad tiles well bedded and jointed with mortar, cover- 

 ing the uppermost flues also with broad thick tiles the whole width, 

 all \cvy closely laid and joined as above, and the said uppermost or 

 last range of flues to terminate, as before observed, in a vent or 

 chimney at one end of the back wall; or if two separate sets of 

 flues, a chimney at each end in which you may contrive an iron 

 slider near its communication with the last flue, to confine the heat 

 more or less on particular occasions, or to prevent its passing oft' 

 too quickly, or becoming of too weakly a degree. 



In very wide stoves flues are continued immediately round the 

 bark pit within an inch or two of the wall, to form a vacancy for 

 the heat to come up more freely, and also to prevent its drying the 

 tan of the bark-bed too much, which flues may be used occasionally 

 or generally by the assistance of a sliding iron regulator, to admit 

 or exclude the heat less or more as it may appear expedient. 



You should be very careful that neither the fire place nor flues 



