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 live years may suffice. Paint is a 

 great preservation 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-w^alls. It is cheaper than 

 wood, and, on account of its lightness, fitter for the 

 purpose, especially when placed on the roof, or ^- 

 gainst the end lights. 



The distance at which the wires should be placed 

 apart for grapes, is ten or twelve inches ; for cher- 

 ries 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 train- 

 ing 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 



T 



