THE MINING AND QUARftV INDUSTRY I913 IO3 



in those for 191 1 and 1912. During the last year the company 

 extended the mine workings containing No. i shaft to a total depth 

 of 450 feet, which is the deepest point to which exploitation has 

 been carried. There is a good showing of ore at the bottom. This 

 shaft has been sunk along a band or lens of nearly solid blende and 

 pyrite that at the surface is 4 or 5 feet thick. Lateral drifts extend 

 from the shaft at intervals of 100 feet, of which the largest on the 

 350 foot level extends a distance of 542 feet. A second shaft 

 northeast of No. i has been carried down to 220 feet depth, along 

 an ore body that is 10 feet thick at the bottom and has been de- 

 veloped for a distance of 175 feet from the shaft. 



A few hundred tons of the crude ore were shipped in 191 1, but 

 the principal grade is too lean and mixed with pyrite to be merchant- 

 able without mill treatment. The company has experimented with 

 a process of magnetic separation and constructed a mill for carrying 

 out the process on a working scale. Up to the present season the 

 experiments have not been thoroughly successful. 



Besides the occurrences described, zinc blende exists at a number 

 of localities in the vicinity of the talc deposits in the towns of 

 Fowler and Edwards, St Lawrence county. One of the first dis- 

 coveries was made on the Balmat place near Sylvia lake, a locality 

 described in the reports of Emmons for the First Geological Survey. 

 It is probable that the blende is accompanied by considerable galena 

 which seems to have been the mineral sought for in the earlier 

 operations. The ore proved too complex to be treated by the 

 methods then in use. Other occurrences in this region are on the 

 property of the Dominion Talc Co., near Sylvia lake, the Streeter 

 farm northeast of the Balmat, the Tamlin place east of the Balmat, 

 the McGill farm 2 miles southwest of Edwards, and the Cole place 

 near the Potter talc mine. 



