Sentence Examples

  • Galena occurs in veins in the Cambrian clay-slate, accompanied by copper and iron pyrites, zinc-blende, quartz, calcspar, iron-spar, &c.; also in beds or nests within sandstones and rudimentary limestones, and in a great many other geological formations.
  • The materials employed are sand, sulphate of soda, nitrate of soda, calcspar and in some works carbonate of barium.

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