THE MINING AND QUARRY INDUSTRY 



95 



cast. There are two shafts 400 feet apart, reaching a depth of 

 something over 100 feet. In the open cut along the outcrop a 

 good exposure is afforded of both the ore body and the inclosing' 

 walls. The distance between the latter averages about 15 feet, but 

 increases in places to jo to 25 feet. The wall rock is a massive 

 gneiss of the same general character as that at Lyon Mountain ; 

 it contains, however, a good deal of hornblende in addition to 

 augite and is quite pegmatitic in places. 



The ore is usually a coarsely crystalline aggregate of magnetite, 

 augite. hornblende and feldspar. It is practically all of concentrat- 

 ing character. An analysis of the crude material ( 1 ) and the con- 

 centrates (2) quoted by Putnam, shows the following composition: 



Iron 



Phosphorus 



No determination of sulfur is given. The output of the mine 

 was concentrated at Standish and used in the furnaces there and in 

 the Saranac valley. 



Arnold hill. The Arnold hill mines have been operated for a 

 longer period, probably, than any other magnetite mines in the 

 Adirondack region. According to local record-, the first discovery 

 of ore was made about 1806. Exploitation began shortly after that 

 date for the supply of forges in the Ausable valley. I'p to [864 the 

 output, which was obtained mostly from open cast workings, 

 amounted to a total of [64,000 tons. The change to underground 

 mining more recently has broadened the scope of operations and has 

 shown the existence of an ore supply sufficient to last for many 

 years. The mines are now worked under lease by the Arnold Min- 

 ing Co. 



The deposits lie along the southern and eastern slope of Arnold 



hill, about a mile west from Arnold station 011 the Ausable branch 



of the D" 1 *•"'"' 2 & Hudson railroad. They form a nearly parallel 

 The ore. j«w .... • , , , f _ 



see- , n. 20 cast, beginning at the south end the first 



(je general cri»i* , ' . . .... . . . 



is ^ \ now abandoned and filled with water, and the 



... Zc <. > present c - ... . , , , . 



Wy-.. ..G ai. m<nes which were mainly worked 111 the earlv 



'.. a.« open cuts. The Arnold or Big mine is about ' j mile north 



01 the latter: it has yielded a large output, but owing to the loss of 



the shaft by caving, it has lain idle for the past 10 or 12 years. The 



Nelson Push or Parton mine, i ^cxi feet north of the Arnold, is the 



only one of the group now under exploitation. 



1 * 2 



34.81 65.14 

 0.041 0.017 



