ON THE GEOLOGY, &C. OF FRANKLIN. 277 



On the Geology and Mineralogy of Franklin, in 

 Sussex County, New Jersey. By Lardner Van- 

 uxem and William H. Keating. Head August 

 6, 1822. 



In the communications which we have lately had 

 the honour of reading to the Academy, we described 

 two minerals which we had discovered at Franklin, 

 Sussex County, New Jersey, during an interesting 

 visit to that spot in the month of August, 1821. Of 

 these minerals one was quite new, and to it we as- 

 signed the name of Jeffersonite. The other was a 

 new variety of the Automalite (Spinelle Zincifere, 

 Hatty,) a mineral which had not yet been found on 

 this side of the Atlantic. We likewise noticed several 

 other minerals, a more particular description of which 

 we deferred until a further examination of the spot 

 should enable us to present to the Academy a satis- 

 factory account of the Geology and Mineralogy of 

 that neighbourhood. We have lately accomplished 

 this task, and our second visit to Franklin has af- 

 forded us objects of equal, if not greater, iuterest, 

 than those which we had collected there last year. 



The environs of Franklin appear to us calculated 

 to interest equally the mineralogist and the metal- 

 lurgist ; to the latter they present the largest deposit 

 of ores which is known to exist either in Europe or 

 America. These ores, varied in their nature, but 

 equal in quality, are accompanied by all that could 

 assist in making them valuable. Not only has nature 



