54 NEW YORK STATE MUSEUM 



found in the footwall, 1600 feet to the southeast, and others occur 

 in the interval. The ore carries from 15 to 40 per cent of sulfur, 

 with an average probably between 25 and 30 per cent. A small 

 quantity is marketed as hand-cobbed ore or " spalls " with about 

 33 per cent sulfur, but the main product consists of mill concen- 

 trates with a content of 40 per cent or more. The concentrates are 

 shipped to acid burners in the East. Though of lower sulfur con- 

 tent than the imported ores, they are a desirable material for acid- 

 making on account of their freedom from arsenic and other in- 

 jurious impurities. A comprehensive account of the Stellaville 

 mines and their equipment has been contributed by Felix A. Vogel 

 to volume 16 of the Mineral Industry. 



The Cole mine at Gouverneur is based on a large outcropping de- 

 posit that was first worked as an open cut. The early development 

 was carried out by the Adirondack Pyrite Co., later succeeded by 

 the American Pyrite Co. The latter company ceased work in 1907 

 and dismantled the mining and milHng plant. The property re- 

 mained idle until the Hinckley Fibre Co. took it over in 1910. As 

 shown in the present workings the ore lies in two parallel bodies 

 separated by 15 or 20 feet of quartz rock. The lower deposit is 

 about 15 feet thick and dips 40° to the northwest. It was first 

 worked by open-cut methods and afterwards through an inclined 

 shaft. The present supply of ore is taken mainly from the over- 

 lying body, which at the point of attack shows a thickness of about 

 50 feet and which is being developed through a raise from the 

 lower workings. The present development of the mine is insuffi- 

 cient to afford much information in regard to the actual relations 

 of the ore bodies and their extent. The crude ore as shipped car- 

 ries from 25 to 40 per cent sulfur, with an average probably of 30 

 per cent or sHghtly less. 



The deposits at Pyrites which were taken over by the Oliver 

 Mining Co. about five years ago have remained inactive. They 

 consist of a series of lenses that strike northeast and dip northwest 

 at an angle of 15°. Their line of outcrop extends across the 

 Grasse river under which there are workings reached from an 

 island in the river. They have been explored in depth by the 

 diamond drill but nothing can be stated as to the results beyond the 

 fact that the ore appears to be persistent. 



Besides the deposits mentioned that have been developed as 

 mines, there are many prospects and exposures of pyrite in the 



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