1W2 



lil RNETTS l.l.l I r. 



181 



There can be no doubt that locally, a good many of the materials 

 of this t'(trni:it,i',)n might by employed in the improvement of soils^ 

 even vftiere they cannot properly be considered as marls in the 

 usual acceptation of the term : provided only; they be convenient 

 to the tract where they arc to be used. The soils of S. E Missis- 

 sippi show very generally extremes of heaviness and lightness ; and 

 whenever the increased facilities of communication shall be such 

 as to render practicable the more costly methods of improvement 

 in the soils of particular localities, the materials of this formation 

 will be called in requisition in preference to others which would not 

 serve the double purpose of a chemical and mechanical manure. [See 

 Agr. Rept r ,Gen. Ft. | As an example of a material which, though 

 not suitable for transportation to a distance, would form an emi- 

 nently useful addition to any soil to which it could be conveniently 

 applied, 1 subjoin the analysis of a green loam forming part of an 

 outcrop, a section of which is given below. 



(Sec. 40.) 



SECTION AT BURNETT'S BLUFF, MARION COUNTY. 



The air-dried material of the lowest stratum (No. 1) lost, on ignition, 4.967 

 per cent, of moisture, and gave the following result : 



GREEN LOAM FROM BURNETT'S BLUFF, MARION COUNTY. 



Insoluble Matter (clay and silex) 83.691 



Potash ••••.... 0.827 



Soda 0.268 



Lime 0.793 



Magnesia 1.053 



Brown Oxide of Manganese 0.223 



Peroxide of Iron 4.394 



Alumina 8.347 



Phosphoric Acid 0.148 



Sulphuric Acid 0.022 



99.761. 



