| http://www.w3.org/ns/prov#value | - I-Ie pointed out that the leasing system had notonly proved a burden upon the national treasury, but had ledto a wasteful manner of working the mines, and had given riseto much friction between the United States and individual citi-zens.' By the acts of Congress of July 11, 1846, March 1, 3, 1847,the mineral lands for lead, copper, and other base metals were puton the market for sale.2Attempts t
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