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CONSTRUCTION OF HOT-HOUSES. 289 



reckoned finished with less than three good coats ; 

 and would require a coat on the outside every year, 

 or every second year at farthest. On the inside, 

 once in four or five years may suffice. Paint is a 

 great preservative to timber in all situations, and in 

 none more than in the hot-house. By the action of 

 the weather without, and the heat of the flues with- 

 in, it is very much tried. 



Of Trellising. 



Roof trellising is now universally of wire, and 

 often also that against back-walls. It is cheaper 

 than wood, and, on account of its lightness, fitter 

 for the purpose, especially when placed on the roof, 

 or against the end lights. 



The distance at which the wires should be placed 

 apart for grapes, is ten or twelve inches; for cherries 

 or peaches, four or five. The distance of the wires 

 from the glass, for grapes, a foot ; for peaches and 

 nectarines, nine inches. But there should be a 

 lower trellis, with the wires placed at two feet apart, 

 and a foot under the proper trellis, on which to 

 train the summer shoots of vines that are in a full 

 bearing state, in order that there may not be too 

 great a confusion of fruit, shoots, and foliage. See 

 training of vines. 



When vines are trained up the rafters in a stove 

 or green-house, they should not be nailed to the 

 beam ; but three rows of wire should be extended 

 for them, at the distance of four or five inches from 

 each other, and three from the rafter ; being set out 



