Changes

===1889-1929===

===1889-1929===

====Silver mining===

===Silver mining===

Silver mining began in Montana and boomed in the 1880's because of a combination of factors: geographic concentration of silver in shallow vein systems, maintenance of a subsidized silver market by the federal government, infusion of outside capital, evolution of mining and smelting technology, and railroad construction. Between 1883 and 1891, silver production in Montana ranked first or second nationwide, with the mines at Butte, Alta, and Granite as primary producers. The boom collapsed in 1893 because of depletion of the state's resources and the collapse of silver prices. Silver mining did continue, but at a reduced level. The Montana silver mining era exemplifies the common tendency for booms to develop, become overblown, and in finally collapse into extended slumps and depressions.<ref> Robert A. Chadwick, "Montana's Silver Mining Era: Great Boom and Great Bust." ''Montana: The Magazine of Western History'' 1982 32(2): 16-31 </ref>  

Silver mining began in Montana and boomed in the 1880's because of a combination of factors: geographic concentration of silver in shallow vein systems, maintenance of a subsidized silver market by the federal government, infusion of outside capital, evolution of mining and smelting technology, and railroad construction. Between 1883 and 1891, silver production in Montana ranked first or second nationwide, with the mines at Butte, Alta, and Granite as primary producers. The boom collapsed in 1893 because of depletion of the state's resources and the collapse of silver prices. Silver mining did continue, but at a reduced level. The Montana silver mining era exemplifies the common tendency for booms to develop, become overblown, and in finally collapse into extended slumps and depressions.<ref> Robert A. Chadwick, "Montana's Silver Mining Era: Great Boom and Great Bust." ''Montana: The Magazine of Western History'' 1982 32(2): 16-31 </ref>  

====Flu, 1918-1919====

====Flu, 1918-1919====