[JAN. THE : HOT-HOUSE. 87 



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

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

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

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

 end walls, upon which a board may be 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 tlie 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 carried 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 to 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 sliding iron regulator, to use occasionally in ad- 

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

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

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

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

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

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

 all very 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 off 

 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, 

 be carried too near any part of the wood-work, lest it should take 

 fire. 



Proceed now to set out the cavity for the bark-pit, first allowing 

 a space of eighteen inches, or rather two feet wide round the front 

 and both ends, and also a walk of two feet, or two and a half, along 



