LEAD ORES. 



country, or an elevation, in a straight line ; or " sinkholes^ 

 or a peculiarity of vegetation in a linear direction./^'he 

 " diggings" seldom exceed 25 or 30 feet in depth ; for the 

 galena is so abundant that a new spot is chosen rather than 

 the expense of deeper mining. From a single spot, not ex- 

 ceeding 50 yards square, 3,000,000 lbs. of ore have been 

 raised ; and at the diggings in the west branch of the Pecca 

 tonica, not over 12 feet deep, two men can raise 2000 lbs. 

 per day ; in one of the townships, two men raised 16,000 lbs. 

 in a day ; 500 ltfs. is the usual day's labor from the mines 

 of average productiveness. 



Galena also occurs in the region of Chocolate river and 

 elsewhere, Lake Superior copper region ; at Cave-in-Rock 

 in Illinois, along with fluor ; in New York at Rossie, St. 

 Lawrence county, in gneiss, in a vein 3 to 4 feet wide ; near 

 Wurtzboro' in Sullivan county, a large vein in millstone grit; 

 at Ancram, Columbia county ; Martinsburg, Lewis county, 

 N. Y., and Lowville, are other localises. All these mine9 

 have been worked, but they are now abandoned. Dr. Beck 

 says of the Sullivan county and St. Lawrence mines, " in 

 the latter the ore is in small veins with good associates, and 

 is easily reduced ; but the situation of the mines is bad. 

 [n the former, the ore is in large veins with bad associates, 

 (zinc blende,) and is more difficult of separation and reduc- 

 tion ; but the mines are admirably situated, whether we re- 

 gard the removal of the ore or the facility of transporting 

 produce to them." 



In Maine, veins of considerable extent occur at Lubec ; 

 also of less interest at Blue Hill Bay, Birmingham and Par- 

 sonsfield. In New Hampshire, galena occurs at Eaton, Bath, 

 Tamworth and Haverhill. In Vermont, at Thetford ; in 

 Massachusetts, at Southampton, Leverett, and Sterling, but 

 without promise to the miner. In Virginia, in Wythe coun- 

 ty, Louisa county, and elsewhere. In North Carolina, at 

 King's mine, Davidson county, where the lead appears to be 

 abundant. In Tennessee, at Brown's creek, and at Hays- 

 boro', near Nashville. An argentiferous variety occurs 

 sparingly at Monroe, Conn., which afforded Prof. Silliman 

 3 per cent, of silver; also at Middletown, Ct. 



Uses. The lead of commerce is obtained from this ore. 

 It is often worked also for the silver it contains. It is also 

 employed in glazing commOn stone ware : for this purpose / 

 t is ground up to an impalpable powder and mixed in watei 



