By Thomas Andrew Knight, Esq. 205 



If early varieties be planted in the front, and the earliest 

 where the fine first enters, these being trained immediately 

 over the flue and at a small distance above it, will ripen first ; 

 and if the lower lights be drawn down in fine weather, to the 

 point B, every part of the fruit on the trees which are trained 

 nearly horizontally, along the dotted line C, will receive the 

 full influence of the sun. The upper lights must be moved, 

 as usual, by cords and pullies : and if these be let down to 

 the point A, after the fruit on the front trees is gathered, 

 every part of the trees on the back wall will be fully exposed 

 to the sun, at any period of the spring and summer, after 

 the middle of April, without the intervention of the glass. 

 A single fire-place will be sufficient for a house of 50 feet 

 long ; and I believe the foregoing plan and dimensions will 

 be found to combine more advantages, than can ever be 

 obtained in a higher or wider house.* 



Both the walls and flue must stand on arches, to permit 

 the roots of the trees to extend themselves in every direction, 

 beyond the limits of the walls ; for whatever be the more 

 remote causes of mildew, the immediate cause generally ap- 

 pears to be want of moisture beneath the soil, particularly if 

 it be combined with excess of moisture, or dampness, above 

 it. In experiments which I have made to discover the cause 

 of mildew, in other plants, I have found that nothing so 

 effectually prevents its appearance as abundant moisture be- 



* The inclination of the roof is depressed 6 degrees below that of my Vinery ; 

 because the lights will always be drawn down at, or before Midsummer, and till 

 near that period the solar rays will every day fall more and more perpendicularly 

 on the roof ; and the lower lights can, with this inclination, be drawn down to 

 the point B, without coming into contact with the ground. 



