OF THE JEFFEUSONITE. 195 



highly productive. To the late Dr. Bruce, we are 

 indebted for the first light thrown upon this interest- 

 ing section of our country, and to him the honour of 

 the discovery of the red zinc ore is due. This was, 

 undoubtedly, the first step toward the advancement of 

 that section of the country. The next, and a more 

 important one, was the determination of the real na- 

 ture of the substance, which had hitherto been consi- 

 dered as a common iron ore, and which is now known 

 under the name of Franklinite, as a combination of the 

 oxides of iron, zinc, and manganese. This discovery 

 was made in the Laboratory of the Royal School of 

 Mines in Paris, in the spring of 1819, and has been 

 published by Professor Berthier, in the 4th volume 

 of the " Annales des Mines," 1819. 



Having in the month of August last, visited this spot 

 with my friend Lardner Vanuxem, esquire, of the 

 South Carolina College, our attention was directed 

 with peculiar pleasure to a bed of ore, which offered a 

 number of new and interesting varieties of minerals, 

 and which we think bids fair to become as celebrated 

 in mineralogy, as the localities of Uto or Arendal. 



It is not my object at present, to enter into an enu- 

 meration of the minerals which occur there ; this I 

 shall defer, until I am enabled to furnish the Acade- 

 my with a mineralogical and geological description 

 of that vicinity, an object which Mr. Vanuxem and I 

 have long had in contemplation, and which we shall 

 probably soon accomplish, unless it be previously 

 undertaken by some abler observer. I shall merely 

 state, that the minerals which we collected, in.- 



