ADIRONDACK MAGNETIC IRON ORES 39 



The workings are situated on the east, south and west sides of a 

 north and south spur of Mt Hope. A drift has been excavated 

 entirely through the hill on the strike of the ore, showing a thickness 

 of 10 feet at the western entrance. It opens into a chamber 200 feet 

 long, extended down the dip to the water level, and averaging 6 or 

 8 feet in hight. In another drift to the north two seams of ore 24 

 and 80 inches thick occur. The dip ranges from io° to 30 . On the 

 east side of the hill there are three open cuts which are on the same 

 or parallel veins. 



The deposit shows a tendency to form shoots and the walls are 

 irregularly spaced with evidences in places of slight breaks. The 

 reddish granite which has been mentioned as occuring on the foot- 

 wall of the Potter and Podunk mines appears in force, sometimes 

 in contact with the ore and again giving way to the schists. Bunches 

 of black garnet are found in the latter, possibly as a result of contact 

 action. 



The ore averages leaner than the product from the Potter and 

 Podunk mines on the eastern end of the belt. It is mixed with peg- 

 matite, hornblende, mica and other minerals, but contains little 

 pyrite. Most of the material in the stock pile is low grade and 

 probably would not assay over 30 per cent iron as an average. 

 The following analyses give the composition of the ore. In No. 1 

 which has been communicated to the writer by Mr S. R. Potter 

 the iron is reported wholly as monoxid. The analysis was made 

 by Messrs Booth, Garrett & Blair of Philadelphia. No. 2 is quoted 

 from Maynard, the analysts being Maynard and Wendell. 



1 2 



Fe 2 3 42 . 09 



FeO 85.481 19.10 



Si0 2 7 . 180 20 . 04 



Tio; 370 



S 077 .32 



P 2 O s 038 



A1 A 3-533 7-9o 



MnO tr. .32 



CaO 2.380 7.87 



MgO 1.280 2.46 



100.339 too. 31 



Iron 61. 900 44.31 



Phosphorus . 01 7 . 092 



Titanium .272 



