Air purifier and staircase at a similar base. From Library of Congress, Prints and Photographs Division, Historic American Engineering Record [HAER MN-100-68]
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The lower portal, 1910. Courtesy Minnesota Historical Society.
Loading the Columbia Star, sometime in the 1980s. The Columbia Star was renamed American Century in 2006.
Bureau of Mines’ Minneapolis campus, seen in the 1970s. From NPS 2009.
The RL Hearn GS, seen in the 1960s by the looks of it.
The ruined workhouse of Pool 5, after the 1945 explosion.
Seen from the air in 1931, the peak of the Residential School program. From Gordon Goldsborough, Manitoba Historical Society
A close-up of the main building, now in ruins. Source: Michigan Tech Archives (MS058-102-08-001)
A postcard of Birtle in the 1930s. From Manitoba Historical Society.
Engraving, 1886, MR2.9SP3.1Yp2, MNHS.org