238 Of Change ^Individuals. Chap. XV^ 



which proves both the Truth and Ufe of the reft $ 

 viz. That when any Sort of Vegetable* by the due 

 Degrees of Heat and Moifture it requires, is agree- 

 able to a Soil, it may, by the new Horfe-hoeing 

 Hufbandry, be continued without ever changing the 

 Species. 



chap. xv. 



Of Change of Individuals. 



SEEDS, in their natural Climate, do not dege- 

 nerate, unleis Culture has improved them ; and 

 then, upon Omiffion of that Culture, they return to 

 their nrft natural State. 



As the Benefit of changing of Species of Seeds is 

 from Difference of Tillage, fo the Benefit of chang- 

 ing Individuals of the lame Species appears to be 

 from thofe Caufes which are, generally, themfelves, 

 the ErTecls of different Climates, fuch as Heat and 

 Moifture, which may alfo vary very much in the 

 fame Latitude and Neighbourhood ; as the fame 

 Mountain in the Country of the Mogul (related by 

 Mr. Evelyn 1 from Monfieur Bernier), on the South 

 Side produces Indian Plants, and on the North Side 

 European Plants, from different Expofures \ and fome 

 Land, retaining Water longer, "is colder; fome, fuf- 

 fering it to pais down quicker, and by the Nature 

 and Figure of its Parts, caufes fuch a Refraction and 

 Reflexion of the Sun's Rays, which give a great 

 Warmth, as in Sand, and gravelly Grounds, that are 

 well fituate, and have an under Stratum of fome 

 Sort of hollow Matter, next under the Staple (a), 



(a) This hollow Matter !ers the Water pafs down the fooner 

 from the Surface, whereby the Staple of the Ground becomes the 

 drier, and coniequently warmer. 



5 or 



