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Indian corn, coffee, &c. ; Lime plants, to which all 

 leguminous plants, as beans, pease, &c., belong, as 

 likewise tobacco ; and Silica plants^ including 

 wheat, barley, rice in fact, all cerealia and grasses. 

 These different species of plants will, of course, 

 flourish best in soils in which the principal mineral 

 element required is present in largest proportions 

 in an assimilable state ; hence, Potash plants thrive 

 best in a clayey soil containing a large quantity of 

 Potash, Lime plants flourish in a calcareous soil, 

 while all the cerealia and grasses require a rich, 

 silicious earth for their profitable cultivation. 

 Those plants which have a wider dissemination, and 

 are known to grow and thrive in almost any soil, 

 belong to none of these classes in particular ; that 

 is to say, the different parts and organs of the plants 

 belong to different categories, as, the leaves and 

 stem to the one, the seeds, &c., to the other. 



Classification of some of tfie principal Plants. 



