38 



The following analyses will exhibit their average richness in 

 iron ; and display, moreover, the amount and nature of the 

 extraneous substances, which occasionally interfere with their 

 reduction. 



Analyses. 

 Peters' Mine, Ringwood, Bergen county. 

 Description. — Ore, magnetic, perfectly granular and crystal- 

 line ; the grains uncommonly large and distinct. Contains a few 

 spots of yellowish decomposed mineral. It is extremely friable. 

 Specific gravity. — 5-112 at a temperature of 65-5° Fahr. 

 Composition. — Iron, - - 71-9 per cent. 

 Insoluble matter, 0-3 do. 



Alumina, - a trace. 



Lime, - - none. 



Good Hope Mine, Ringwood. 

 Description. — Ore, magnetic, beautifully crystalline ; the grains 

 exhibiting nearly regular facets. Contains a little interspersed 

 yellowish clayey matter. 



Specific gravity. — 5-019 at temperature 50° Fahr. 

 Composition. — Iron, - - 71-88 per cent. 

 Insoluble matter, 1-5 do. 

 Lime and alumina, a trace. 



" Cannon Ore,^' Ringwood. 



Description. — Ore, magnetic, highly crystalline; the grains dis- 

 tinctly angular and rather small. Contains much white and green- 

 ish mineral matter. 



Specific gravity. — 4-685 at temperature 69° Fahr. 



Composition. — Metallic iron, 63-2 per cent. 



Mount Hope Blue Mine, Morris county. 

 Description. — Ore, magnetic, compact and massive ; having but 

 little of the granular structure. Fracture nearly flat, but not 

 smooth ; somewhat mottled with white and greenish specks. 

 Specific gravity. — 4-918 at temperature 65° Fahr. 

 Composition. — Metallic iron, - 69.6 per cent. 

 Insoluble matter, - 2-8 do. 



