240 METALS. 



boring towns of Beekman, Fishkill, Dover, and Amen a, N. 

 Y. ; also in a similar situation north, at Richmond and Lenoj, 

 Mass. ; also at Bennington, Monkton, Pittsford, Putney, and 

 Ripton, Vermont. Large beds are found in Pennsylvania, 

 the Carolinas, near the Missouri iron mountains, and also in 

 Tennessee, Iowa and Wisconsin. 



Uses. This is one of the most valuable ores of iron. It 

 s also pulverised and used for polishing metallic buttons and 

 other articles. As yellow ocher, it is a common materia, 

 for paint. 



Gdthite, Lepidokrokite. These are names given to crystals of a hy- 

 drous pcroxyd of iron, differing in composition from brown iron ore by 

 containing half as much water. The crystals are of a brown color, and 

 blood-red by transmitted light when subtransparent. Streak brownish- 

 yellow to ocher-yellow. H=5. Gr=40 — 42. Occurs with hematite 

 at Eiserfeld in Nassau ; at Clifton in Cornwall ; in Siberia and else- 

 where. 



FRANKLINITE. 



Monometric. In octahedral and dodecahedral crystals, 

 and also coarse granular massive. Color iron- 

 black; streak dark reddish-brown. Brittle. 

 H=5'5— 6-5. Gr=4-85 — 5*1 ; acts slightly 

 on the magnet. 



Composition : peroxyd of iron 66, sesquoxyd 

 of manganese 16, oxyd of zinc 17. Alone in- 

 fusible. At a high temperature zinc is driven off, and is 

 deposited on the charcoal ; with borax on a platinum wire, 

 in the outer flame, it gives the violet color due to manganese ; 

 and in the inner flame on charcoal, the green color due to iron. 



Dif. Resembles magnetic iron, but the exterior color is 

 a more decided black. The streak is not black, and the 

 blowpipe reactions are different. 



Obs. This is an abundant ore at Sterling and Hamburgh, 

 in New Jersey, near the Franklin furnace ; at the former 

 place, the crystals are sometimes 4 inches in diameter. It is 

 said to occur also in the mines of Altenberg, near Aix-la- 

 Chapelle. t 



Uses. The attempts to work this ore for zinc have not 

 jeen successful. 



What is said of the uses of brown iron ore ? What is the appear- 

 nee of franklinite ? What is its composition ? How is it distinguish- 

 d from magnetic iron ore ? 



19* 



