G R 



G R 



this is many times attributed to the 

 GlafTes in Front admitting the Cold, 

 y/hen the Fault is in the Roof: for 

 where there is only the Covering 

 either of Tiles or Slates, and the 

 Cieling, every fevere Froft will pene- 

 trate through them. 



In this Green-houfe you fhould 

 liave TrufTels, which may be moved 

 out and into the Houfe; upon which 

 you mould fix Rows of Planks, fo 

 as to place the Pots or Tubs of Plants 

 in regular Rows one above another, 

 whereby the Heads of "the Plants 

 may be fo fituated as not to interfere 

 with each other. The loweft Row 

 of Plants, which fhould be the for- 

 warder! towards the Windows, fnould 

 be placed about four Feet therefrom, 

 that there may be a convenient 

 Breadth left next the GlafTes to walk 

 in Front : and the Rows of Plants 

 fhould rife gradually from the firft, 

 5n fuch a manner, that the Heads of 

 the fecond Row fhould be intirely 

 advanced above the firft, the Stems 

 only being hid thereby : and at the 

 Back fide of the Houfe there fhould 

 be allowed a Space cf at feaft five 

 Feet, for the Conveniency of water- 

 ing the Plants j as alfo to admit of a 

 Current of Air round them, that the 

 Damp. c , occasioned by the Perfpira- 

 tion of the Plants, may be the better 

 <d '(Rpatcd ; which, by being pent 

 th too clofeiy, often occafions a 

 Mouldinefs upon the tender Shoots 

 tfnd Leaves; and when the Houfe is 

 'clofe fhut up, this flagnating rancid 

 Vapour is often very deftructive to 

 the Plants: for which Reafon alfo 

 you fhould never croud them too 

 clofe to each Other ; nor mould you 

 ever place Sedums, Euphorbiums, 

 Torch-thiftles, and other tender fuc- 

 culent Plants amongft Orangey 

 ^jVlyrtle.% and other ever-greenTrees ; 

 fer„ by an Experiment which I made 

 ..4mq 1729. I found that a Sedum, 



placed in a Green-houfe among fuch 

 Trees, almoft daily increafed its 

 Weight, although there was noWa- 

 ter given to it the whole time : which 

 Increafe of Weight was owing to 

 the Moilture imbibed from the Air, 

 which, being replete with the rancicj 

 Vapours perfpired from the other 

 Plants, occafioned theLeaves to grow 

 pale, and in a fhort time they de- 

 cayed, and dropped off : which I have 

 often obferved has been the Cafe 

 with many other fucculent Plants, 

 when placed in thofe Houfes which 

 were filled with many Sorts of ever- 

 green Tree?, that required to be fre- 

 quently watered. 



Therefore, to avoid the Incon- 

 venience which attends the placing 

 of Plants of very different Natures 

 in the fame Houfe, it will be very 

 proper to have two Wings added to 

 the main Green-houfe: which, if 

 placed in the manner exprefTed in 

 the annexed Plan, will greatly add to 

 the Beauty of the Building, and alfo 

 collect a greater Share of Heat. In 

 this Plan the Green-houfe is placed 

 exactly fronting the South ; and one 

 of the Wings faces the South-calf, 

 and the other the South-well : fo that 

 from the time of the Sun's firft Ap- 

 pearance upon any Part of the Build- 

 ing, until it goes off at Night, it is 

 conftantly reflected from one Part to 

 the other; and the cold Winds are 

 alfo kept off from the Front of the 

 main Green-houfe hereby : and in 

 the Area of this Place you may con- 

 trive to place many of the raoft 

 tender Exotic Plants, which will bear 

 to be expofed in the Summer- feafon 5 

 and in the Spring, before the Wea- 

 ther will permit you to fet cut the 

 Plants, the Beds and Borders of this 

 Area may be full of Anemonies, Ra- 

 nunculus's, early Tulips, &c. which 

 will be paft flowering, and the Roots 

 fit to take out of the Ground, by the 



