Ball mill at the Bradley Mine mill at Stibnite in Valley County, Idaho circa 1940. This photo gives a close up view of the ball mills which are used to crush ore. The opening and trough where crushed ore exits the mill is clearly shown in the...
A great photo of a very busy sidewalk as Movie goers line up for the feature, "Return to Payton Place", at the Boise Theater. Dozens of neon signs crowd the buildings lining this section of the street.
Technical data and correspondence relating to several engineering projects of Johnson, Underkofler and Briggs of Boise, Idaho, including mechanical and electrical construction primarily in southwest Idaho.
Switch gear of the first electric hoist used at the Bunker Hill Mine operated by the Bunker Hill and Sullivan Mining and Concentrating Company near Kellogg, Idaho. The hoist serviced the No. 1 shaft. Photo circa 1917.