Torrey on a nezv Ore of Zinc. 235 



nium. The veins of the calc spar are nearly at right an- 

 gles with the sutures. 



It is a remarkable fact that the specific gravity of this 

 rock, (which is 2.86,) the cells, the geodes, the calc spar, crys- 

 tals, and the quartz crystals, are similar to those of a transition 

 granular quartz rock in Rensselaer county, almost one hun- 

 dred miles from Barnagat. A fair opportunity for making 

 the comparison will probably remain at Schuyler's lock for 

 ages ; as the faced stones are from Barnagat and the back 

 stone from the granular quartz in Rensselaer county. 

 Most respectfully, 



AMOS EATON. 

 Prof. Benj. Silliman. 



Troy, July 3d, 1822. 



Art. IV. — Description and Analysis of a nezv Ore of Zinc ; 

 by John Torrey, M. D. of New-York. {From theJVeiv- 

 York Medical and Physical Journal for April, May, and 

 June, 1822.) 



[Read before the N. Y. Lyceum of Natural History, April, 1822.] 



This mineral was discovered about two years ago, in the 

 town of Ancram, in the state of New-York ; a place remark- 

 able for its iron works and lead mine. It was found on ta- 

 king down one of the old walls of the furnace, erected in 

 the year 1744. It attracted notice from its great weight; 

 and although it resembled some common stone, ft was sup- 

 posed to be an ore, though of what metal was not conjec- 

 tured. Several specimens having been sent to me for ex- 

 amination, I submitted them to analysis ; and the result was 

 altogether different from what the appearance of the mine- 

 ral indicated. It proved to be a nearly pure oxyd of zinc, 

 and an ore of that metal distinct from any hitherto descri- 

 bed. This induced me to make further inquiries respecting 

 the mineral, as it would be exceedingly valuable if found in 

 sufficient quantity ; but I have, as yet, been able to procure 

 very little satisfactory information respecting it, Mr. Seth 

 Hunt, who visited Ancram in October last, was informed by 

 Mr. Thomas Ackers, manager of the lead mine, and Rob- 



