TAB, X. 



FERRUM csemleum. 

 Azure Iron Ore. 



Class 2. Metals. Order 1. Ductile. 



Gen. S. Iron. Spec. 7» Azure Iron Ore, 



Spec. Char, Contains sulphur ? and iron. 

 Syn. Blue martial earth. Kir. v. 2. 185* 



Blau eisenerde. Emmerling, v. 1. 359. 



Fer azure. Hauy, v. 4. 119. 



1 h 1 s is very common in marshy grounds at different 

 depths in most parts of the united kingdom. 



The upper figure represents some as found at Blackwallj 

 or the Isle of Dogs, where great abundance was met with 

 about four feet deep, in a sandy loam, mixed with roots and 

 other vegetable remains. At the depth of about nine feet, 

 in some places, it was mixed with a black clay, turf, leaves, 

 hazel-nuts, Sec. It occasionally exists among earth with 

 the remains of shells, and is common in marshy places 

 without any appearance of vegetable. I found some once 

 on the shell of the Mytilus anatinus in Hyde-park, and have 

 had it sent me from Scotland, 



