AND CONSERVATORY. 543 



at most twelve feet high, above a given leveUine for; 

 its floor. The parapet all round to be a foot or 

 fifteen inches high, and the upright glasses pla- 

 ced on it, four, or four and a half feet at most. For 

 it is of importance, for the sake of the finer kinds 

 of plants, and in order to have all kinds grow bushy, 

 and flower while young and small, (in which state 

 they are certainly most attractive and pleasing,) to 

 keep the roof glasses as low as possible ; -just allow* 

 ing sufficient head-room to the tallest person when 

 walking in the alleys. 



The furnace and stock-hole may be placed at ei- 

 ther end, or at either side, as may be most conve- 

 nient ; and they should be sunk under ground, and 

 be concealed *. The flue to be constructed in all 

 respects as described in Section I. of the Forcing 

 Garden, page 281. ; to run parallel to, and be se- 

 parated from the parapet by a three inch cavity \ 

 its surface being level with the top of the parapet, 

 and being crib-trellised for heaths, Botany Bay, 

 and other rare plants. A walk thirty, or thirty*six 

 inches broad, to be conducted all round within the 

 flue ; within which to be placed the stages for the 

 more common, and the taller plants ; being raised 



* The smoke, in this case, should be conducted by a funnel 

 under ground, to some little distance, and should be voided by 

 a stalk about two yards high ; which would give sufficient draught 

 to the furnace, and which might be concealed by a few thick- 

 growing evergreen shrubs. If a tea-room or other building bo 

 near, the smoke may be conducted to, and be voided by its chim- 

 ney. 



