102 



NEW YORK STATE MUSEUM 



The ore in general appearance is not unlike the product of some 

 of the mines in the eastern Adirondacks. It has a fine granular 

 texture. The magnetite grains are regularly distributed through a 

 matrix of quartz and feldspar. The quartz is rather more abundant 

 than in most Adirondack ores. A little biotite. pyrite, apatite and 

 red garnet can be identified in the hand specimen. It has been 

 reported that the ore carries spinel, but no mineral answering its 

 description was found by testing, and very likely it has been confused 

 with the garnet. The latter, however, fuses readily under the 

 blowpipe, while spinel is quite refractory. 



The average content of the ore in iron is said to be about 33 per- 

 cent. Portions of the deposit run as high as 40 or 45 per cent. 

 There is little barren material, and in the former operations all the 

 juaterial quarried was sent to the mill. Analyses of the crude ore 

 (1), concentrates (2) and tailings (3) are given herewith: 



1 2 3 



Ferro-ferric oxid 



(Fe 3 4 ) 88.08 1.93 



Ferrous oxid (FeO) 5.07 



Ferric sulfid (FeS 2 ) .864 3.06 



Silica (Si0 2 ) 5.97 59. 80 



Titanic oxid (Ti0 2 ) Nil 



Phosphoric acid 



(P 2 O s ) .086 .696 



Alumina (Al 2 O.0 '• 2 - 2 6 21 .75 



Manganous oxid 



(MnO) 2.04 .237 



Lime (CaO) .28 2.27 



Magnesia' (MgO) .18 1.75 



Potash (K 2 0) ' .912 



Soda (Na 2 0) .326 



Water (H..O) undet. undet. 



99.76 97.801 



Total iron 34-94 64 . 1 8 



Manganese r .58 



Sulfur .48 .461 



Phosphorus .178 .037 



The analysis of concentrates represents the result obtained from 

 a combined sample of 132 cars. The phosphorus is well below 



