ECONOMICAL GEOLOGY. 
271 
The above description of the Cherokee ore beds is made from the ab- 
breviated notes of a hurried exploration made several years ago. These 
■fine ore ranges are eminently worthy of detailed study and mapping ; and 
it is hoped that before long some additional investigation may be made. 
Prof. Bradley has recently published some very interesting notes of ob- 
servations and measurements on different parts of the range, in the 
American Journal of Science, and it is hoped he will pursue the subject. 
This completes the description of the North Carolina iron ores, as far 
as my investigations and information have gone. There remains much 
to do to complete the chapter ; there are many blanks to fill, and whole 
■counties, of which little is known, except that they contain iron ores. 
My work has been necessarily limited to the study of such ore beds as 
have happened to be opened, and of course these are but a small propor- 
tion of the whole, in a region always wholly devoted to agriculture and 
studiously eschewing all sorts of manufacturing. A map of the iron ore 
deposits of the State, as far as known, is a desideratum which it is hoped 
will be supplied in the next volume. 
It may be worth while to add here, as a sort of appendix to the 
-chapter, an analysis by Dr. Genth, of a sample of spathic iron from Conrad 
Hill, Davidson county : 
Oxide of Iron, 17.70 
Oxide of Manganese, 2.00 
Magnesia, . 10.77 
Lime, 0.63 
Carbonic Acid, Water Ac., 38.81 
Metallic Iron, 37.10 
This spathic ore, (siderite), is found in many of the mines of Cabarrus, 
Rowan and Davidson, and in some of them in large quantities. At the 
Cosby Mine in Cabarrus, an immense heap of it has been thrown out in 
mining for copper, and it is contaminated by the presence of copper 
pyrites. 
2. Copper Ores. 
For obvious reasons, there has been little mining done in North Caro- 
lina since the war, and so but little has been done in the way of re-open- 
ing old or discovering new copper mines. Dr. Emmons brought down 
the description of enterprise in this direction pretty nearly to the date of 
