936 NEW YORK STATE MUSEUM 



tons of pig iron daily. Most of the ore is furnished by the Port 

 Henry Iron Ore Co. from Mine 21. 



Arnold Hill mines. The Arnold Hill magnetite mines, situated 

 on the Ausable branch of the Delaware & Hudson Railroad, have 

 been active during the past year. The deposits were among the 

 first to be exploited in the region, but till 1850 the output was made 

 by opening pits along the outcrop. The ore is found in several 

 parallel veins of lenticular shape which overlap and are separated 

 by various thicknesses of wall rock. Sometimes two or more 

 veins can be attacked from a single stope. The ore belongs to two 

 types, "blue vein" which is a rich martite and "black band" or 

 magnetite. At present the mines are worked by the Arnold Mining 

 Co. of Harkness. The two shafts, known as the north and south 

 shafts, are located about a mile from the railroad. A concentrating 

 plant has been erected at Arnold Station, to which the ore is con- 

 ve^^ed from the mine by a gravity plane. The ore as mined is first 

 crushed to coarse size and concentrated on Ball-Norton machines. 

 It is then passed through rolls and reconcentrated. 



Lyon Mountain. The Lyon Mountain deposits lie on the Lake 

 Placid branch of the Delaware & Hudson Railroad and are operated 

 by the Chateaugay Ore & Iron Department of this company. 

 They comprise a series of large veins or impregnations in the coim- 

 try, the whole forming an ore zone that extends fully five miles on 

 the strike. In all there are about 25 openings, but only 8 are now 

 worked. The inclined shafts or slopes have been sunk to a maxi- 

 mum of 1600 feet on the dip or about 800 feet vertically. As a 

 rule the ore carries about 40% magnetite. It is concentrated to an 

 average of 66% iron, with the remarkably low phosphorus content 

 of .007%. A part of the ore is smelted by the company, and the 

 remainder is shipped to Pennsylvania furnaces. It yields high 

 grade Bessemer iron. 



In the vicinity of Lyon Mountain, no. 81 mine at Stan dish has 

 been idle for the last two years. Its ore is similar to that described 

 above, and the deposit may belong to the same zone. The Park- 

 hurst mine near Bradley pond and the Williams mine between 

 the latter and Lyon Mountain yield a richer ore, but it contains 

 more phosphorus. At Clayburg, Redford and other localities in 

 the Saranac valley, there are a number of ore beds that were once 

 worked for making iron by the bloomery process, and some interest 

 is being shown in their re-opening, which will depend largely on the 

 extension of railroad facilities. 



