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Research and development division, Economics Laboratory

Employees of the research and development division of the Economics Laboratory (later Ecolab) at work on the sixth floor of the Globe Building in St. Paul, 1938. Pictured are John Effinger, Roy Frommer, Clarence Olson, and John Lewis Wilson.

Researchers at the University of Minnesota

Researchers at the University of Minnesota working on a project affiliated with the Works Progress Administration (WPA), ca. 1940.

aerial view of Reserve Mining Company village

Reserve Mining Company Village, View of Silver Bay

Reserve Mining Company Village, View of Silver Bay, c.1960.

Residence of Duluth architect Issac Vernon Hill at 2220 East Superior Street, Duluth

I. Vernon and Cora Hill House, Duluth. Designed by I. Vernon Hill, 1902.

Residence of Frank Dear being moved, Hibbing

Frank Dear's residence being moved, 1920.

Residence of George O.Robertson, Nininger

Illustration of the residence of George O.Robertson in Nininger, Dakota County, made c.1874. Taken from An Illustrated Historical Atlas of the State of Minnesota by A.T. Andreas (page 95).