26 NORTH-CAROLINA GEOLOGICAL SURVEY. 



Potash, 78 &quot; 



Soda, 30 &quot; 



Chlorine, 29 



Sulphuric acid, 34 



507 



If five hundred pounds of the earthy constituents of this 

 soil are removed from one acre in one year or in a single 

 crop, it will amount in one hundred years to fifty thousand 

 pounds a quantity which would exhaust most perfectly any 

 of the ordinary soils of the country. 



In an analysis which I have made of the kernels and cobs 

 of the yellow corn, I found : 



COBS. KERNELS. 



Silica, 4.67 5.93 



Earthy phosphates 8.22 22.18 



Lime, 0.10 0.10 



Magneisa, 30 1 .50 



Potash 12.31 14.95 



Soda, 2.03 14.11 



Chlorine, 0.04 0.39 



Sulphuric acid 0.11 2.74 



61.81 



That the composition of the leaves may be compared with 

 the foregoing, I subjoin an analysis of the leaves made at the 

 same time and growing upon the same plant: 



LEAVES. 



Silica, 82.88 



Earthy phosphates, 29.27 



Lime 9.40 



Mtgneisa, 1-91 



Potash, 1^-70 



Soda, 13.14 



Chlorine 15.U7 



Sulphuric acid, 6.46 



It might be supposed that as the sheaths of the leaves be 

 long in one sense to the leaves themselves, that their composi 

 tion would be the same ; but this is not the case as may be 

 seen by the following analysis : 



