117 



5113, Melbourne; a splieroidal form of carboBate o£ iron, ■ 

 tiiowu as sphcero-siJerite, occupying spherical cavities in basalt. 



5186, Coolgardie. Iron silicate. 



Hydrous silicate of iron and alumina ; 9868, Chamoison, Chamoisite. 

 France. Copiapite. 



Hydrous sulphate of iron ; 7443, Chili. 



Hydrous phosphate of iron ; 4196, Yictoria ; beautiful crystals vivianite. 

 in radiating groups ; 3864, Utah ; gold- and silver bearing. 



Hydrous phosphate of iron ; 6210, Cornwall ; 3453, Virginia, Dufrenite, 



Eluo -phosphate of iron and manganese; 8675, Saxony. Triplite. 



Di-sulphide of iron ; 6193, Cornwall ; good cubic crystals. Pyrite. 



601, Erench Creek, PennsyNania ; good octahedral crystals. 



8143, Cornwall ; onammillated form. 



Di-sulphide of iron, crystallising in rliomlic forms ; very Marcasite. 

 liable to decompose. 



608, 6192, 6194; nodules from the Chalk Formation of England. 

 6194 shows the rhombic platy crystals well ; it will be noticed 

 how very different they are from the common cubes of pyrite. 



604, Belgium ; a nodule ; 6190, Alston (Eng.) ; decomposing. 



3499, Joi3lin, Missouri ; where it is of very common occurrence 

 in the zinc-lead mines. 



Magnetic pyrites, sulphide of iron ; Bavaria and Tasmania. Pyrrhotite, 

 See " Arsenic." Mispickel, 



Titaiiiferous iron ore, ilmenite. Massive forms from Canada Ilmenite. 

 and NorAvay ; sands from Canada and JN'ew Zealand. 



8195, beach sand, Onehunga, JS'ew Zealand; containing 

 51| per cent, of metallic iron and 13 per cent, of titanic acid. 

 The presence of titanic acid in quantity in an iron ore renders it 

 very refractory and difficult to smelt. Up to the present all 

 attempts to utilise these sands commercially have failed. 



600 and 6815, Eussia ; good crystals in pegmatite. 



6215, Iser, Bohemia; a granular variety known as Iserine. 



