102 NEW YOftK STATE MUSEUM 



following analyses which have been communicated to the writer 

 by Mr W. Carey Taylor. 



I 2 3 



Fe 2 3 , 46.152 49-757 67.274 



FeO 20.735 22.354 30.224 



Si0 2 31.700 26.134 3.000 



S .008 .016 .080 



P 2 5 005 .016 .165 



A1 2 3 1.076 1. 531 



MnO .037 .090 



CaO -3 6 4 •3 I 5 



MgO .872 .229 



100.949 100.442 100.743 



Iron 48.43 52.22 70.60 



Phosphorus . 002 . 008 .07 



Analyses 1 and 2 are of crude ore from the mines of the Peru 

 Steel & Iron Co., at the east end, and No. 3 of concentrates made 

 by the same company. The higher phosphorus found in the con- 

 centrates proportionately to that shown in the analyses of the ore 

 is abnormal and contrary tu the usual experience in the treatment 

 of magnetites, at least by magnetic methods. The concentration 

 practice at the Palmer hill mines consisted in first roasting the ore 

 so as to render it more friable and then crushing by stamps and 

 passing the broken ore over jigs. The bloom iron made by the com- 

 panies was mostly shipped to Pennsylvania for manufacture into 

 crucible steel. 



Production. The output of the mines owned by the J. & J. Rogers 

 Co. averaged about 25,000 tons annually for a period of 40 years. 

 The production by the Peru Steel & Iron Co. is not known, nor the 

 quantity mined before the organization of the two companies. It is 

 safe, however, to estimate the total yield at over 1,000,000 tons 

 crude ore. The average assay in iron may be placed at about 40 

 per cent. 



Other mines in the district 

 Jackson hill. The mines at this locality are based on two or three 

 parallel bodies that outcrop north and south of the road leading 

 from Palmer hill. They lie on the western side of the hill at from 

 1000 to 1 150 feet elevation. Their course is n. 20 e. and dip high 

 to the north. The two main pits are each about 500 feet long and 



