| http://www.w3.org/ns/prov#value | - All mines and mining claims, both placer and rock in place, containing or bearing gold, silver, copper, lead, coal or other valuable mineral or metal deposits, after purchase thereof from the United States, shall be taxed at the price paid the United States therefor, unless the surface ground, or some part thereof, of said mine or mining claim is used for other than mining purposes, and has a sepa
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