Roller coaster, Wonderland Amusement Park, Minneapolis.

Roller coaster, Wonderland Amusement Park, Minneapolis.

The Scenic Railway (a roller coaster) at Wonderland, from above, c. 1906.

Ronning Ensilage Harvester (front)

Ronning Ensilage Harvester (front)

Ronning Ensilage Harvester (front) patented by Andrean and Adolph Ronning of Minneapolis in 1915. Manufactured by the American Harvester Company, also of Minneapolis.

Ronning Ensilage Harvester (side)

Ronning Ensilage Harvester (side)

Ronning Ensilage Harvester (side) patented by Andrean and Adolph Ronning of Minneapolis in 1915. Manufactured by the American Harvester Company, also of Minneapolis.

Ronning road planer prototype

Ronning road planer prototype

Ronning road planer prototype

Rookwood counter/advertising sign

Rookwood counter/advertising sign

Rookwood tile owned by Henrietta Barclay Paist and used in her studio in St. Paul.

Portrait photograph of Roy Wilkins

Roy Wilkins

Roy Wilkins, c. 1955

Photograph of Martin Luther King, Roy Wilkins, and Thurgood Marshall

Roy Wilkins (center) with Martin Luther King and Thurgood Marshall

Roy Wilkins (center) with Martin Luther King and Thurgood Marshall, c. 1959

1975 Photograph of Roy Wilkins, Samuel Richardson, Governor Wendell Anderson and an unidentified man.

Roy Wilkins (second from left) with Samuel Richardson (left), unidentified man, and Governor Wendell R. Anderson (far right)

Roy Wilkins (second from left) with Samuel Richardson (left), unidentified man, and Governor Wendell R. Anderson (far right), 1975.

Ruins of Weber's residence after cyclone, Rochester.

Ruins of Weber's residence after cyclone, Rochester.

Ruins of Weber's residence after cyclone, Rochester. Stereograph by J. C. Cook, August 21, 1883.

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