FORCING HOUSE FOR GRAPEI. Ill 



from being vertical. The asterisk D points out its position 



at the equinoxes, and E its position in midwinter. 



In this building, which is forty feet long, and is heated ^'"*» 



by a single fire place, the flue goes entirely round without 



touching the walls; and in the front a spaceof two feet is 



left between the flue and the wall, in the middle o^" which vlne!.''^'^* 



space the vines, which are trained to the roofs, about eleven 



inches from the glass, are planted ; and as both the wail and 



flue are placed on arches, the vines are enabled to extend 



their roots in every direction, while, in the spring, their , ^ 



growth is greatly excited by the heat, which their roots and i 



stems receive from the flue. Air is generally admitted at 



the ends only, where all the sashes are made to slide, to af- •^"''a^J™''*^ 



111 > . at the ends, 



ford a free passage of air through the house, when necessary, 



to prevent the grapes becoming mouldy in damp seasons. 

 About four feet of the upper end of every 3d light of the 

 roof is made to lift up, (being attached by hinges to the and by lifting 

 wood-work on the top of the back-wall) to give air in the j"^j^\°^^ ^"^ '^^ 

 event of very hot and calm weather; for I prefer givinsf air 

 by lifting up the lights, to letting them slide down, be- 

 cause when the former method is adopted, no additional 

 shade is thrown on the plants. ^ 



The preceding plan is here particularly recommended for 

 a vinery only; but 1 am confident, that, by sinking the ^,1*^ P^*" *1^ 

 front wall below the level of the ground, and making asmall pine stove.* 

 change in the form of the bark-bed, the same elevation of 

 roof may be made equally applicable to the pine stove, and 

 that no upright front glass ought, in any case whatever, to 

 be used ; for light can always be more beneficially admitted ^P"^^f ^^^^} 

 by adding to the length of the roof, if that be properly ele- ous. 

 vated ; and much expense may be saved both in the build- 

 ing, and in fuel. For forcing the peach or nectarine, I 



must, however, observe, that I think any house of the ure- '^^'^^*^o"se 

 J. J. . 1 11 • , , ^ not fitted to 



cedmg dimensions wholly improper; and I purpose to sub- the peach or 



mit a plan for the improved culture of those fruits to the "*^**""«» 

 Horticultural Society at a future opportunity. 



The vine often bleeds excessively when pruned in an im- 

 proper season, or when Accidentally wounded, and I believe Compo.ition 

 no mode of stopping the flow of the sap is at present known blpedrng^^f 

 t« jfardeners. I therefore mention the followinij-, which I *"^*^- 



discovered 



