ELISHA MITCHELL SCIENTIFIC SOCIETY. 93 



trees grew in their present position. During the subsequent sub- 

 mergence of the coast line (of which there is abundant evidence) 

 these trees grew in a sinking region. The trees dying, their stumps 

 and roots were preserved by being surrounded and covered with 

 sedimentary deposits. 



TJnwersity of N. C. J. A. Holmes. 



ANALYSIS OF KAOLIN. 



I. H. MANNING. 



This specimen was secured by Mr. A. E. Wilson, near Hall's, in 

 Jacks- n county, in the western part of this State. It was in the 

 form of a compact lump, having a good white color which darkened 

 very slightly on ignition. No signs of fusion could be observed 

 before the blowpipe, nor were large gritty particles to be detected 

 on rubbing in a mortar. The soluble matter present was determined 

 by taking about 25 grains of the kaolin, boiling with water, filtering 

 and evaporating a definite portion of the filtrate, weighing the 

 residue. The soluble matter forms .088 per cent, of the whole. 



The complete analysis is as follows : 



SiOo 41-48 



AI0O3 37.09 



Organic matter 12. 60 



CO3 2.22 



HgO-.. 5-68 



CaO. _ 18 



MgO - - - - .24 



NagO 



K,0 ' - - -- •" 



FegOe- 31 



S trace. 



No attempt was made at determining in what form this sulphur 

 was present. 

 Chemical Laboratory, TJ. N. O. 



