THE MINING AND QUARRY INDUSTRY 93 



The entire production of the mines is marketed in the form of 

 concentrates. Formerly the richer material was sorted out and 

 shipped separately, but this practice has been discontinued. The 

 quantity of crude ore treated daily is about looo tons. From two 

 and a half to three tons are required to make one ton of concen- 

 trates. 



In its metallurgical character the Lyon Mountain ore is unique 

 compared with the product of other mines in the Adirondacks. It 

 is all well below the Bessemer limit carrying a remarkably small 

 percentage of phosphorus. The sulfur content is likewise low. The 

 following analyses recently made by Mr James Brakes, chemist for 

 the mining company, give complete details as to the composition of 

 the ore : 



I 2 



Ferric oxid (Fe.Og) 31 .48 60. 128 



Ferrous oxid (FeO) i5-8i 28.850 



Silica (SiO^) 33.16 6.880 



Titanic oxid (TiOs) .427 .417 



Sulfur (S) .027 .022 



Phosphoric acid (P2O5) .043 .023 



Alumina (AI2O3) 4.90 .900 



Ferrous oxid (gangue) (FeO).. 2.83 .257 



Manganous oxid (MnO) .115 . 107 



Lime (CaO) 4.96 .660 



Magnesia (MgO) 2 . 10 .405 



Potash (K2O) 1 .438 .494 



Soda (NagO) 2 . 283 . yy^j 



Moisture (HoO) .25 .040 



99.823 • 99.960 



Total iron 36.50 64 . 72 



Iron in magnetite 34 • 30 64 . 53 



Phosphorus .019 .010 



Titanium . 256 . 250 



Manganese .089 .083 



Analysis no. i re^^resents the crude ore and no. 2 the concen- 

 trates. Both are made from average samples taken in the usual 

 course of operations. While the concentrates in the above analysis 

 contain .010 per cent phosphorus, this represents about the maximum 

 limit for the mine. The percentage of sulfur fluctuates from about 



