The Adirondack Region — Magnetic Iron Ores. 31 



of ore annually, and to put it in distant markets, in successful com- 

 petition with other ores, and other iron-ore districts. They find 

 their way to blast furnaces in all the Eastern and Middle States, and 

 even further west and south, for use in puddling furnaces. An ideal 

 composition is afforded in the following analysis of Witherbees, Sher- 

 man & Co.'s ores from Old Bed 21 ore. 



Metallic iron ._ 66.18 



Oxygen with iron 25.25 



Insoluble, silicious matter 1.94 



Phosphoric acid 2.45 



Alumina __. .76 



Lime _ 2.27 



Magnesia _ .14 



Potoxide of Manganese .36 



Loss and undermined .07 



100.00 



Metallic iron 66.18 



Phosphorus 1.07 



The western range, or belt of ore, at Mineville is opened in the 

 New Bed mines, the Barton Hill and Fisher Hill mines. It is a 

 half mile west of the 21 mine and Little Joker mines. Throua;h 

 the New Bed and Barton Hill mines the range has been exploited and 

 proven to be continuous. In the character of the ore also there is a 

 proof of the oneness of the deposit or ore body. 



NEW BED MINES.— These mines are at the south-west end of 

 the range. Beginning at the south-west, there are : theEoe shaft, Big 

 pit, Wasson shaft, Dalton shaft and North- pit. The first named is a 

 vertical shaft, sunk through the overlying rock to the ore. At the 

 Big pit three well defined ore beds crop out. They have been fol- 

 lowed — the lower one, to the south-west, about 1.800 feet, on the 

 dip of the ore bed ; the upper one, for 400 feet. About ten feet of 

 rock separates the lower and the middle beds ; from the latter to 

 upper there is rock for six to fifteen feet. 



The dip at the mouth of Big pit is 20° to south-west. The ore 

 occurrence in these several workings is marked by pincJtes and sJiools, 

 by slips or faults, and by rolls and offsets in the wall rocks. Another 

 marked feature is a dike eight feet wide, which crosses the ore beds 



