11)8 



BULLETIN OF TUE ESSEX INSTITUTE, 



Augite, . 



Augite, Brown, 



Azurite, 



Baltimorite, 



Basanite, 



Bastite, 



Biotite Mica, 



Bog-butter, 



Bog Iron Ore, 



Bog Manganese, 



Bornite, 



Bronzite, 



Brown Augite, 



Brown Hematite, 



Brown Ochre, 



Brown Spar, 



Brucite, 



Cairngorm Stone, 



Calcite, . 



Calc Spar, 



Cancrinite, 



Carbonate of Copper, Blue, 



Carbonate of Copper, Green, 



Chalcedony, 



Ohalcopyrites, 



Chert, 



Chiastolite, 



Chromic Iron, 



Chroniite, 



Chrysolite, 



Chrysotile, 



Cinnamon Stone, 



Clay Iron Stone, 



Coal, Earthy Brown, 



Columbite, 



Copper, Blue Carbonate of , 



Copper, Gray, . 



Copper, Green Carbonate of , 



Copper Ore, Variegated, 



Copper Pyrites, 



Cossyrite, 



Cryophyllite, 



Crystal, Rock, 



Danalite, 



