40 Bulletin of the New York State Museum. 



separable by sorting. It is about 100 feet deep. The plant of the 

 Arnold Hill mine comprises one 100-horse-power hoisting engine, 

 with friction drums for two slopes, two 8-inch Cornish plunger 

 pumps, two Allison air compressors, Sargent drills, cars, etc. 



Automatically dumping cars of 1^ tons capacity are used in the 

 mine ; and 5-ton cars carry the ore from the shaft, on a gravity road to 

 the head of the plane, which is 3,500 feet long, ending at the dump 

 at Ferrona. A stationary engine controls the movement of the cars 

 up and down this plane. The ore is shipped via Au Sable Branch rail- 

 way and Plattsburgh to furnaces in New York, Pennsylvania and Ohio. 

 It is a rich, non-Bessemer ore. The total output since the first open- 

 ing in 1830 is estimated to be 400,000 tons. Since 1881 these mines 

 have been the property of the Arnold Ore Company, J. N. Vance, 

 president ; Jno. N. Gliclden, secretary, Cleveland, Ohio, and Joseph 

 Payette, manager, Ferrona. 



COOK MINE, Au Sable, Clinton County. — This mine is one and 

 a half miles east of Ferrona station. It has lain idle for nearly 

 twenty years. The Arnold Ore Company owns it. 



WILLIAMSBURG- [MINE, Black Brook, Clinton County.— This 

 mine was worked up to 1887, by Bowen and Signor, in which year 

 it became the property of E. A. Carpenter, of Cambridge, Mass., and 

 F. M. Vilas, of Buffalo. The mine has been opened 1,200 feet on 

 the course of the "vein," and 160 feet in depth. There is a large 

 body of ore, but it is nearly all lean and requires to be concentrated. 

 The mine was first opened in 1855, and was worked for the supply 

 of the forges of Bowen and Signor, at Bedford, Russia, and Saranac. 

 Its total production is reported to amount to 260,000 tons. 



TREMBLAY'S MINE, Saranac, Clinton County.— Peter Trem- 

 blay's mine is on lot No. 72, Township 4, at Peterburgh, in the town 

 of Saranac. It was opened in 1867, and worked for the supply of 

 forges of Tremblay and others, in the neighborhood ; it has been idle 

 since 1885. The greatest depth reached was 80 feet. 



DANNEMORA, Clinton County.— The mine of iron ore on the 

 state property at the Dannemora prison has been idle for nearly 

 twenty years. The ore bed dips northward ; the ore is lean and 

 sulphurous. 



The Skinner and Averill mines in this vicinity were worked for 



