AND CONSERVATORY. 543 



at most twelve feet high, above a given level-line for 

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

 teen inches high, and the upright glasses placed on 

 it, four, or four and a half feet at mc^t. 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 al- 

 lowing 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 ihirty-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 hj 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 be 

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

 ney. 



