4 JSTotices of the Mineralogy and Geology^ ^c. 



state. Silver, it is thought, has been discovered in the for- 

 mer district, near Andersonville. 



Of this, I shall endeavour to obtain specimens in the 

 summer, when I expect to visit the upper country. 



At the Warm Springs, (Buncombe County, North Caro- 

 lina,) limestone begins to be found, as we go west. After 

 passing them, we are in the limestone country. A lime- 

 stone cave is situated very near them. Patent yellow* is 

 found native within a few miles, unless the chemists and 

 painters, who have examined the substance there found, be 

 deceived. Sulphate of barytes is abundant in the neigh- 

 bourhood. 



General remarks. The localities given in Cleaveland 

 from MoClure, I find almost always correct, and I presume 

 I should find them always so, had I time for strict examina- 

 tion. 



Mineral springs abound. Among the most interesting, is 

 a very strong sulphureous spring, a few miles from Cam- 

 bridge, South Carolina, near Saluda. This was examined 

 by the late Dr. Smith. It promises fair to be the most 

 useful in the state. 



The rough draught belowf is intended for a perpendicular 

 section in a W. N. W. direction from the mountains to the 

 sea, passing through the tract of limestone, and that of ar- 

 gillaceous schistus. 



I remain with great respect, 



Your grateful pupil, and sincere friend, 



JOHN DICKSON. 



Postscript by the Editor. — Accompanying the specimens 

 transmitted by Mr. Dickson, was a very perfect crystal of 

 corundum ; it is a regular prism of six sides — the diagonal 

 diameter measures one inch, and the greatest length of the 

 crystal is nearly three-fourths of an inch ; its colour is blue ; 

 it scratches carneiian, garnet, and beryl ; it presents the 

 cleavage and striaj of the East Indian corundum, and in 

 fact, looks in all respects so like the specimens from those 



* Such was, at first, the imprflssion of the late Professor E. D. Smith, of 

 the College of South Carolina, but it was raliier weakened by examination 

 of the facts and of the evidence. — Edilor. 



t This sketch being ha?(ily maric v.-ilh (hr ppo. if wa-^ not (hoiight ncces- 



