98 NEW YORK. STATE MUSEUM 



friable magnetite carrying apatite and otherwise resembling the 

 Nelson Bush ore. The gray vein is so named because of the light- 

 colored gangue minerals which are intermixed with the magnetite 

 so as to lend a mottled gray appearance to the ore when seen in 

 hand specimens. It is slightly altered. In the blue vein the ore 

 has been changed almost completely to martite, the surface of 

 which is steel blue in color. The change no doubt is to be explained 

 as the effect of weathering assisted perhaps by the circulation of 

 underground waters which have found here an easier passage, 

 possibly along some fissured strip, than in the neighboring veins. 

 Specimens of this ore frequently show veinings of jasper and cal- 

 cite, deposited by such circulations. Analyses of the ore from the 

 blue vein are given herewith. No. 1 has been contributed by Mr 

 S. Le Fevre. No. 2 is quoted from the paper by Maynard on " The 

 Iron Ores of Lake Champlain "; Maynard and Wendell analysts. 



1 2 



Fe 2 3 83.14 85.54 



FeO 5.27 2.39 



, Si0 2 . 7-64 7-56 



Ti0 2 :. . .26 



S 035 .16 



P 2 5 531 -43 



A1 2 3 . x * 1.72 2.71 



MnO 31 



CaO 64 .98 



MgO 108 .48 



Cu . 005 



Ni . 003 



99.662 100.2 



Iron 62.30 61.74 



Phosphorus .232 . 188 



Manganese .24 



Titanium .156 



Open cuts, Finch and Chalifou pits. The open -cut workings 

 south of the Arnold mine were the sources from which ore was 

 obtained during the early period, but they were abandoned with 

 the discovery of the larger deposits to the north. The only infor- 

 mation about them that has been placed on record is contained 

 in Emmons's report. There are four parallel deposits, according 

 to this authority, the richest being from 2 to 8 feet wide, known 

 as the blue vein, with martite. At the time of the report, it had 



