2l6 NEW YORK STATE MUSEUM 



rusty appearance. Two veins of pyrite occur but they are poorly 

 exposed and their size is undeterminable from present observations. 



A prospect shaft was put down some years ago on the Alexander 

 Parr farm, now owned by Henry Fleming, situated 3 miles north- 

 east of Bigelow, in the town of De Kalb. The portion of the vein 

 to be seen in the shaft, which is partially filled with water, consists 

 of about 6^ feet of pyrrhotite. About 50 yards north of the shaft 

 a prospect exposes about 9 feet of pyrrhotite. Typical specimens 

 of the ore returned 20.80 per cent sulphur and 0.22 per cent arsenic. 



The Mitchell prospect is in the town of De Kalb. about 2f miles 

 northeast of Bigelow, on property now owned by D. G. Styles, but 

 which formerly belonged to. Calvin Mitchell. The opening, a shaft 

 of uncertain depth, is on the southeast edge of a small ridge just 

 north of Indian creek. The shaft is said to have been excavated in 

 the spring of 1904. It is now filled with water to within about 

 20 feet of the top, and in the exposed part shows 7 to 8 feet of pjrrite 

 ore, in the middle of which is a band of p3rrrhotite gneiss. About 

 35 feet northeast of the shaft a small prospect exposed 7 feet of 

 sulphides. At a distance of 200 feet southwest of the shaft another 

 prospect reveals about 2 feet of pyrrhotite ore. An analysis of the 

 pyrrhotite showed 23.48 per cent sulphur and 0.16 per cent arsenic. 

 It is probable that the whole vein will average about 25 per cent 

 of sulphur. 



The Styles shaft is about i| miles northeast of Bigelow, near the 

 elbow of Indian creek, on land owned by D. G. Styles. It was put 

 down in 1904 at the same time as the Mitchell shaft. About 9 feet 

 of pyritic gneiss is exposed in the shaft, the vein being composed 

 of alternate bands of sulphides and lean rock. The ore consequently 

 varies in character from place to place and the average is probably 

 about 20 per cent sulphur. 



The prospect known as the Henricks shaft is located in the town 

 of De Kalb, i^ miles south vv'est of Bigelow and southwest of the 

 railroad which crosses Boland creek. The shaft is now flooded, but 

 apparently the vein is narrow, averaging about two feet thick. 

 The sulphur content is reported to be about 30 per cent. The same 

 vein has been traced by trenching and by pits for a distance of 300 

 feet, and at the southern end close to the railroad tracks it widens 

 to 6 feet. Limestone forms the foot wall of the gneiss. 



Pyrite in graphite ores. Pyrite occurs in association with the 

 graphite ores which are mainly exposed on the eastern side of the 

 Adirondacks in Essex, Warren and Washington counties. In most 

 of the deposits the content is small and the pyrite is present in finely 



