Sentence Examples


  • Gold, lead, copper and iron ores occur as veins.
  • Iron ores have been found in most of the states, and are especially abundant in Minas Geraes.
  • The problem of the profitable treatment of the sulphide ores has been practically solved here.
  • The manganese ores of the Bathurst district of New South Wales often contain a small percentage of cobalt - sufficient, indeed, to warrant further attempts to work them.
  • Sefstrom definitely proved the existence of a metallic element vanadium, which had been previously detected (in 1801) in certain lead ores by A.