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ORDER IX—LEAD. This Order contains the following species, viz. Gale na or Lead-glance, Blue Lead-ore, Bournonite or Anti- monial Lead-ore, Oobaltic Lead-ore, Native Minium, White Lead ore, Black Lead ore, Corneous Lead-ore or Muriate of Lead, Phosphate of Lead, Arsenate of Lead, Sulphate of Lead or Lead-vitriol, Yellow Lead-ore or Molybdate of Lead, and Red Lead-ore or Chromate of Lead. 1. Galena or Lead-G lance. Bleiglanz, Werner. This species is divided into two subspecies: 1. Com mon Galena or Lead-glance. 2. Compact Galena or Lead-glance. First