Torrey on a new Ore of ZiM^ Z3b 



nium. The veins of the calc spnr 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,) tlje 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 hack 

 stone from the granular quartz in Rensselaer county. 



Most 



Prof. BeNJ. SiLLlMAN. 



AMOS EATOiV. 



Troy, July 3d, 1 822, 



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

 by John Torrey, M. D. of New-York. (From theJYciv- 

 York Medical and Phi/deal Journal for April, May, and 

 June, 1822.) 



[Read before the N, Y. Lyceum *^ Natural History, April, 1G22.J 



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, it 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 i( found in 



I have, as yet, been able to procure 



sufficient quantity ; but 1 

 very little satisfactory in 



ty httle satisfactory information respecting it. Mr. Seth 

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

 ^Ir. Thomas Ackers, manager of tho lead mine, and Rob- 



I 



i 



