W A 



W A 



made two Feet deep, the third a 



Foot and an half, and the fourth one 

 Foot deep ; which four Flues, with 

 their Coverings, will rife near eight 

 Feet in Height ; fo that there will 

 be about two Feet left for the fixing 

 of the Frames at the Top to fupporc 

 the Glafles, and for coping the 

 Wall. And thefe four Returns will 

 be fufficient to warm the Air in the 

 Frames ; for the Smoke will have 

 ]6ft its Heat by the time it ha3 pafied 

 thus far. 



In the carrying up of thefe Walls, 

 there fliould be fome ftrong iron 

 Hooks raileird at convenient Di- 

 itances, which mould project about 

 two Inches from the Wall, to which 

 the Trelafe mult be faften'd, which 

 is to fupport the Trees. Thefe 

 Hooks UiGuld be long enough to 

 fatten into the Back-wall ; for the 

 Wall in Front, being but four Inches 

 thick, will not be ftrong enough to 

 fupport the Trelafe : but, in placing 

 of them, Care fliould be had not to 

 lay them crols the Middle of the 

 F'ues, becaufe they would oburucl 

 the clearing the Flues of Soot, when 

 ever there fliould be occafion : 

 fo that the beft Way is to lay them 

 j aft under the Tiles which cover each 

 Flue, at about three Feet afunder; 

 which will be near enough, provided 

 the Hooks are made fufficiently 

 ftrong. As the Flues mull be well 

 plafter'd with Loam on their Infide; 

 fo, likewifc, fliould the Loam be 

 fpread under the Tiles, which cover 

 them, to the Thicknefsof the Hooks, 

 that the Flues may be very fmooth; 

 otherwife the Soot will hang to the 

 iron Hooks, a>d flop the Smoke 

 from palfing. It will alfo be very 

 proper to cover thefe Flues cn the 

 Side next the Trelafe with Hep- 

 bags, or fome fuch coarfe Cloth, in 

 the fame manner as hath been di- 

 rected for the Stoves i which will 



make them fo tight, that no Smoke 

 will find its Way, which, without 

 this Covering, it is very apt to do, 

 thro' the Joints of Walls ; efpecially 

 when they are fo thin as thefe mult 

 be built : and this Covering will 

 ftrengthen the Wall of the Flues, and 

 join the whole Work together. If, 

 at eath End of th fe Flues, there are 

 final 1 Arches turn'd in the Back- 

 walls, in fuch a manner that there 

 may be Holes open'd to clean the 

 Flues of Soot, whenever there is a 

 Neceflity for it, the Trouble will be 

 much lefs than to open the Flues in 

 Front ; and there will be no Damage 

 done to the Trees, nor will the" 

 Flues be the leaft injured by this, 

 which they mud be, when they are 

 open'd in Front. 



The Borders in Front of thefe 

 Hot-walls fliould be about four Feet 

 wide, which will make a fufficient 

 Declivity for the Hoping Glaffes ; 

 and in thefe Borders there may 

 be a Row of dwarf Peas planted 

 to come early, or a Row of dwarf 

 Kidney - beans, either of which 

 will fucceed very well ; and if 

 if they are not planted too near the 

 Trees, will not do them any Injury. 

 On the Outfide of thefe Borders 

 fliould be low Walls erected, which 

 fliould rife about an Inch or two 

 above the Level of the Borders ; up- 

 on which the Plate of Timber fliould 

 be laid, on which the Hoping Glafles 

 are to reft : and this V/all will keep 

 up the Earth of the Border, as alfo 

 preferve the Wood from rotting. 



The Glafles which are defign'd to 

 cover thefe Walls, muft be divided 

 into two Ranges ; for as they muft 

 reach from the Ground-plate (juft 

 above the Level of the Border) to al- 

 moft the Top of the Wall, they wiH 

 be near twelve Feet long ; which will 

 be too great Length for fmgle 

 Frames, which, when they are more 



