Improvement of arable Land. 1 43 



Chymifts have toucht upon, its Weight, is as 

 Jure Indication of its Goodnefs, as any of 

 the afore-mcntioned, as containing therein 

 great quantity of Nitre, and other folid Ma- 

 terials that give it Ligature and Ponderofity, 

 •and render it fit for the Production of Corn, 

 Trees, Flams, and Other Vegetables of all 

 Sorts, ufeful for human Life, or the Refreili- 

 nients of it, and firft by fight. 



I can't think it fufScient to believe, with 

 fomeof the Antients, that blackifh Grounds 

 are Cold and Dry ; for where-ever there 

 is mixture of Sand, the contrary evidently 

 appears : Or that all hot and choleric Grounds* 

 are red or brown ^ that cold and moift are 

 always whitiih, or hot, and moift, ruddy. 

 Thefe participate of thefe (everal Qualities, 

 as they are more or lefs mix'd with a fandy, 

 gravelly, or arcnacious, or on the contrary 

 vdth heavy and clayey, lumpy, or fluggiflt 

 Materials ; or as they are many times tinctu- 

 red and difcoloured by (landing Water, or 

 Rains, by Exhalations from Minerals, the 

 heat of the Sun, or other Accidents; Molds 

 of a lively Chefnut are the beft, of which 

 Colour are the beft Loames, and alfo the beft 

 natural Earths* next that, dark Grays and 

 Ruflet: the light and dark A ih Colour are 

 the very worft, bfing fuch as are found on 

 common heathy Ground : The clear Tawny 

 is by no means commendable, but the yel- 

 lowiih Red is the wcrft of all, as they are 



like^ 



