Mijcettanea Curioja, 2-9 



But, which is a further Proof of what I am 

 here endeavouring to advance, that Soil that is 

 once proper and fit for the Production of fome 

 one (brt of Vegetable, does not ever continue 

 to be fb. No, in Tract: of time it lofes that 

 Property ; but fooner in fome Lands, and later 

 in others : This is what all who are converfant 

 in thefe things know very well, if Wheat, for 

 Example, be fown upon a Tra6r of Land that 

 is proper for that Grain, the firft Crop will fuc- 

 ceed very well ; and perhaps the fecond, and 

 the third, as long as the Ground is in Heart, 

 as the Farmers fpeak ; but in a few Years 'twill 

 produce no more, if fowed wirh that Corn ; 

 Some other Grain indeed it may, as Birley. 

 And after this has been fbwn fo often, that the 

 Land can bring forth no more of the fame, ir 

 may afterwards yield good Oats ; and, perhaps, 

 Peafe after them. At length 'twill become bar- 

 ren $ the Vegetative Matter, that at fir ft it 

 abounded withal, being educed forth of it by 

 thofe fucceffive Crops, and moft of it born off. 

 Each fort of Grain takes forth that 'peculiar 

 Matter that is proper for its own Nourifh- 

 ment. Firft, the Wheat draws off thofe Par- 

 ticles that fuit the Body of that Plant ; the reft 

 lying all quiet and undifturbed the while. And 

 when the Earth has yielded up all them, thofe that 

 are proper for Barley, a different Grain, remain 

 ftill behind, till the fuccemVe Crops of that 

 Corn fetch them forth too. And fb the Oats 

 and Peafe, in their Turn ; till in fine all is car- 

 ried off, and the Earth in great meafure drain'd 

 of that fort of Matter. 



After 



