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But In conducing fuch an experiment as the naturalization 

 of plants from a fouthern to a northern climate, fo many 

 minute circumftances require our attention, that few people 

 have either tiiis or patience to reach the willied for goal. 



But a careful attention to the charaders which the plants 

 themfelves prefent, will enable us to proceed with more certainty, 

 and hopes of having our endeavours crowned with fuccefs. 



a 



Bv the appearance of the roots and leaves we may nearly de- 

 termine in what kind of foil the plant is moft likely to thrive, 

 Robuft roots and flefhy or rigid leaves require a dry foil, accord- 

 ing to their thicknefs ; ftiff clay or fandy loam, as beans, peach, 

 and apple trees ; robuft fpongy roots which have a tendency to 

 mat near the furface with thin leaves, as the Alder (Betula 

 Alnus), Willows (Salix), require a fomewhat ftiff foil with 

 tnoifture; many of the Salix genus will not grow with their 

 accuftomed vigour, in a light turfy or peat mold foil, for want 

 of the necefl^ary refiftance to the roots, although fuitable in refped 

 to moifture. Slender, hard and wiry roots, as thofe of the pine, 

 Ciftus, &c. require dry, fandy, or gravelly foils. And extremely 

 fine and hairlike roots, as thofe of Erica, Halmia, Rhododendron, 

 &c. muft have a foil whofe particles will not impede the ftiooting 

 of their tender fibres, and with a fmall but regular degree of 

 moifture, that the roots, which by their form cannot refift the 

 llighteft drought, may not be deftroyed. Plants in a warm climate 



P 2 perfpire 



