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the outside of the lights, being neces 

 sary to guard against cutting wind 

 rushing in at that part immediate!} 

 upon the plants, when the lights are 

 occasionally tilted hehind for the ne 

 cessary admission of fresh air, <fcc. 



With respect to the lights, the wood 

 work of the frame should he incl 

 and a half thick and two and a hal: 

 hroad ; and the hars for the immediate 

 support of the glass-work should he 

 ahout an inch hroad, and not more 

 than inch and a half thick ; for if too 

 broad and thick they would intercept 

 the rays of the sun, so should he only 

 just sufficient to support the lights and 

 be ranged from the back part to the 

 front, nine or twelve inches asunder. 



All the woodwork, both of the frames 

 and lights, should be painted, to pre- 

 serve them from decay. A lead colour 

 will be the most eligible ; and if done 

 three times over, outside and in, will 

 preserve the Avood exceedingly from 

 the injuries of weather, and from the 

 moisture of the earth and dung. 



Mr. Knight has suggested an import- 

 ant improvement in the form of frames. 

 He observes, that the general practice 

 is to make the surface of the bed per- 

 fectly horizontal, and to give an incli- 

 nation to the glass. That side of the 

 frame which is to stand towards the 

 north, is made nearly as deep again as 

 its opposite : so that if the mould is 

 placed of an equal depth (as it ought 

 to be) over the whole bed, the plants 

 are too far from the glass at one end of 

 the frame and too near at the other. 

 To remove this inconvenience, he points 

 out the mode of forming the bed on an 

 inclined plane ; and the frame formed 



when on the bed, as represented in the 

 accompanying sketch. 



There are several minor points in 

 the construction of frames that deserve 

 attention^ The strips of lead or wood 

 that sustain the panes of glass should 

 run across the frame, and not length- 

 wise ; they then neither obstruct so 

 much the entrance, of light, nor the 

 passing off of rain. The inside of the 

 frame should be painted white, since 

 plants generally suffer in them for 

 want of light : if the accumulation of 

 heat was required, the colour should 

 be black. 



Saisiny the Frames. It is a well- 

 known difficulty that the gardener has, 

 in raising the frames so as to keep the 

 foliage of the plants within them at a 

 determined and constant distance from 

 the glass. To remedy this, Mr. Nairn, 

 gardener to J. Cresswell, Esq., of Bat- 

 tersea Priory, has introduced the inge- 

 nious contrivance represented in the 

 accompanying sketch and references : 

 A, a moveable frame ; B B, inside lining 

 of the pit ; c c, outer wall. Between 

 these the sides of the frame pass, and 

 are lowered or elevated by racks and 

 spindles, D D. 



with sides of equal depth, and so put j 

 together as to continue perpendicular | 



A more simple plan might perhaps 

 >e adopted, by having frames of the 

 ame length and breadth as the origi- 

 nal, but only from an inch to three 

 nches, or upwards, deep. These, as 

 lecessary, might be put on the top, 

 nd would be kept close by the pres- 

 ure of the lights ; bolts and nuts might 

 Iso be easily applied, and the inter- 

 tices rendered still more impervious to 

 ir by being faced with list. 



(i/<txs find Glazing. See Stove. 



Slteltcr for the Glass. In proportion 



