l60 NEW YORK STATE MUSEUM 



The Coal Hill vein, the largest of the group, has a width of 

 from 2 to 6 feet and is exposed for 450 feet along the strike. 

 According to Emmons, the galena occurs in coarse aggregates, 

 rather irregularly distributed but more abundant in the middle 

 portion than on the walls. Crystal masses weighing over 100 

 pounds have been found. The Victoria vein Ya, mile east of the 

 former, is said to have been 2^ feet wide at a depth of 40 feet. 



The Rossie deposits were opened in 1836. In the two following 

 years, 1625 tons of lead were produced from the Coal Hill vein. 

 The ore was mostly smelted in a local furnace. In 1839 mining 

 was discontinued, but in 1852 the Great Northern Lead Co. secured 

 a lease of the properties and renewed operations, apparently with 

 little success. During the Civil War, the deposits were again 

 worked by the Mineral Point Lead Mining Co., who also owned 

 mines at Mineral Point, on the shore of Black lake. There has been 

 nothing done with the mines during recent years. 



Bibliography 



Beck, Lewis C. Mineralogy of New York. 1842. 



Emmons, E. Geology of New York: Report on Second District. 1842. 

 Smyth, C. H. jr. The Rossie Lead Veins, School of Mines Quarterly, July 

 1903. 



