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In Forcing of Fruit-trees, People 

 generally hang up Thermometers 

 under their GlalTes, for the better 

 adjufting the Heat, and regulating 

 the Fires. But when this is practi- 

 fed, they lhould be hung where the 

 Sun can never mine on them j for 

 one Hour's Sunfhine upon the Ball 

 of the Thermometer, in the Spring 

 of the Year, will fo much rarefy the 

 Spirits, that they will rife to the 

 Top of the Tube ; when, at the 

 fame time, the circumambient Air 

 may not be much more than of a 

 temperate Heat. But as the princi- 

 pal Ufe of thefe Thermometers is 

 to regulate the Fires, they are fel- 

 dom of much Ufe in the Day-time ; 

 becaufe, if there be only one Hour's 

 Sunfhine in the Day on the GlaiTes, 

 it will warm the Air fufficiently for 

 the Production of European Fruits, 

 without any additional Heat ; where- 

 fore there will rarely be any Occa- 

 fion for continuing of the Fires in 

 the Day : and if, by the Fires in the 

 Night, the Air is warmed to the 

 template Point mark'd on the 

 Botanic Thermometers, the Fruit 

 will thrive better than in a greater 

 Heat. 



There are fome Perfons near Lon- 

 don, who make it their Bnfinefs to 

 produce early Fruit to fupply the 

 Markets ; which they perform by 

 the Heat of Dung only, having no 

 Fire-walls in their Gardens. The 

 Method which thefe People follow, 

 is, to have good Quantity of new 

 Dung laid in an Heap to warm (af- 

 ter the fame manner as is praclifed 

 for making of Hot- beds). When 

 this Dung is in a proper Tempera- 

 ture of Heat, they lay itclofeon the 

 Back-fide of their Fruit-wall, about 

 four Feet thick at the Bottom, and 

 foping to about ten Inches or 

 a Foot thick at the Top. This 

 Dung mould be gently beat down 



with a Fork, to prevent the Heat 

 going off too foon j but it mould 

 not be trodden down too hard, left 

 that mould prevent its Heating. The 

 Outfide of the Dung mould be laid 

 as fmooth as poffible, that the Wet 

 may run off more eafily ; and if 

 there is a Covering of Thatch, as is 

 fometimes practis'd, it preferves the 

 Dung from rotting too foon ; where- 

 by the Heat is continued the longer. 

 The time for laying this Dung to 

 the Back of the Wall, is the fame as 

 for making the Fires ; /. e. about 

 the Middle or End of January. The 

 firfh Parcel of Dung will continue 

 warm about a Month or five Weeks; 

 when there mould be a Supply of 

 new Dung prepared, and the old 

 taken quite away, or mixed up with 

 this new Dung, to renew the Heat ; 

 which, if it works kindly, will be 

 fufficient to laft the Seafon. Thefe 

 Walls are cover'd with GlaiTes or 

 Canvas, in the fame manner as the 

 Fire-walls ; and the Trees mull be 

 treated the fame way: but there muft 

 be more Care taken to open the 

 GlaiTes againft thefe Walls, when- 

 ever theWeather will permit ; other- 

 wife the Steams of the Dung will 

 occafion a great Dampnefs through 

 the Wall ; which, if pent in about 

 the Trees, will be very pernicious 

 to them, efpecially at the time they 

 are in Flower. 



By this Method fome Gardeners 

 have forced long Walls filled with 

 old well grown Fruit-trees, which 

 have produced great Quantities of 

 Fruit annually ; which has well an- 

 fwer'd their Expence. But as, in 

 many Parts of England, it will be 

 very difficult to procure a fiifficient 

 Quantity of new Dung for this Pur- 

 pofe, the Fire-walls are molt ufeful, 

 and leafl expenfive. 



I have feen in feme Places long 

 Timbe* fences ere£led to iorceFruit- 



trees 



