IRON 



931 



The coal -measure ironstones, for the five years ending 1872, were produced in these 

 Islands as follow : 



Argillaceous Carbonate, including Blackband. 



Total Iron Ore produce of the United Kingdom in 1872. 



Titanate of iron ; Titanitic iron ; Hmenite. This variety occurs in various forma- 

 tions, as in the miascite of the Ilmen mountains ; in talc, with dolomite, at G-astein in 

 Salzburg ; in the zircon-syenite at Egersund in Southern Norway ; and in gneiss, with 

 magnetic iron ore, at Tvedestrand, and Krageroe, near Arendal ; and in enormous 

 quantities in the Upper Laurentian or Labrador series of the lower St. Lawrence Valley > 

 and Labrador in Canada, with hypersthene and rutile in Labradorite gneiss, the so- 

 called norite rock. The sand produced from the waste of these rocks produces the 

 titaiiiferous iron sands, which are treated in the American bloomary. Its chemical 



3o2 



