A mine entrance at the Oregon Trail Interpretive Center on Flagstaff Hill near Baker City. (Oregon State Archives, 2016)
Eastern Oregon miners in 1906. (Courtesy of Oregon Historical Society)
A prospector walks with his gold mining supplies near Grants Pass in 1903. (Courtesy of Library of Congress)
Algot Sunderlin holds a 75-pound container of mercury at a Harney County pitchblende [radioactive, uranium-rich mineral and ore] plant in the mid 1900s. (Courtesy of Oregon Historical Society)
A 1900s portable scale for measuring gold and other precious metals. (Courtesy of Dani Morley)
A 1920s miner's cap with leather mounting for carbide lamp. (Courtesy of Oregon Historical Society)
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