Sentence Examples


  • In some places sulphur is extracted from iron pyrites by one of two methods.
  • Of the rarer bismuth minerals we may notice the following: - the complex sulphides, copper bismuth glance or wittichenite, BiCu 3 S 3, silver bismuth glance, bismuth cobalt pyrites, bismuth nickel pyrites or saynite, needle ore (patrinite or aikinite), BiCuPbS 3, emplectite, CuBiS 2, and kobellite, BiAsPb 3 S 6; the sulphotelluride tetradymite; the selenide guanajuatite, B12Se3, Iv.
  • The hardness (6-62) is the same as that of pyrites, and the specific gravity (4.8-4.9) as a rule rather less.
  • Iron-pyrites come almost entirely from Department.
  • The table below gives the average production of zinc, argentiferous lead, iron-pyrites and other ores during the quinquennial period 1901f 905.
 

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