212 NEW YORK STATE MUSEUM 



About 900 tons of ore were taken out by the company for experi- 

 ment, which are reported to have averaged 22 per cent sulphur and 

 to have yielded 300 tons of concentrates. In the earlier period 

 of active mining the deposits had been worked to a maximum 

 depth of 250 feet. The better grade of ore is said to occur in shoots 

 which have a northeasterly trend and a northwest dip. Pyrrhotite 

 occurs in considerable bodies, but is not mixed with the pyrite to 

 any extent. 



Stella mines. These are i mile north of Hermon. They include 

 workings on the Stella vein which were first opened and has been 

 exploited to a depth of 900 feet on the dip and for 11 00 feet along 

 the strike, with an average thickness of from 10 to 12 feet and the 

 Anna workings which are based on parallel ore bands which measure 

 50 feet thick in the aggregate and are tapped by a single shaft. 

 The mines are now operated by the St Lawrence P3rrites Company 

 who took over the property about 1905. 



The upper vein on which the Stella shaft is situated is a thin 

 band which shows great regularity and persistence. It has a 

 northeasterly strike and a dip to the northwest of from 20 to 30 

 degrees. Work on the deposit has been discontinued of late years 

 and operations carried on solely in the Anna mine, where there are 

 four parallel ore bands with an aggregate thickness of 50 feet or 

 more. The individual veins are separated from each other by 

 75 to 100 feet of country rock which here is a basic hornblende 

 type that may be a metamorphosed gabbro. The Anna shaft is 

 over 600 feet deep and the connected levels extend 1800 feet along 

 the strike. The crude ore is treated in a mill equipped with jigs 

 and tables. The concentrates as shipped carry about 45 per cent 

 sulphur. The milling capacity is about 250 tons crude ore a day 

 with one-third to one-half of that amount in concentrates. 



Cole mine. This property was worked for several years by the 

 Hinckley Fibre Company who shipped the ore crude for use in 

 sulphide manufacture. In 19 17 the New York Pyrites Company 

 was organized for its operation. The new undertaking has begun 

 shipments of crude ore, but contemplates the erection of a mill 

 which will enable the output to be marketed in a more desirable 

 form for acid manufacture. The installation of mine and milling 

 plan has been in progress during 19 18. The shape of the ore bodies 

 at this locality shows a considerable departure from the simple form 

 that characterizes most of the other deposits in the district. The 

 structure of the deposit, however, has not yet been satisfactorily 

 worked out. In the early operations two bands or veins were 



