Observers gather for the duck race at Norway Brook, August 10, 2018. Used with the permission of the Cass County Historical Society.

Observers gather for the duck race at Norway Brook, August 10, 2018. Used with the permission of the Cass County Historical Society.

A young fisherman pulls in a fish on the first day of the fishing season at Pine River Dam, May 11, 2013. Used with the permission of the Cass County Historical Society.

Pine River Dam and Power Plant, 1912 (C-LA-94). Used with the permission of the Cass County Historical Society.

Figure 1 of Herbert Sellner’s “Patent Application for Amusement Device,” filed with the US Patent Office on April 24, 1926. Sellner Patent Application for Amusement Device, Sheet 1, filed April 24, 1926. United States Patent and Trademark Office. Public domain.

Cover of the Ideal Lamp Company catalog, 1917. Sellner Collection, Rice County Historical Society, Faribault. Used with the permission of Rice County Historical Society.

Mahogany and tinned-iron patent model of a flour mill dust collector patented in 1879. The introduction of dust-collecting machines to flour factories greatly increased the safety of the milling process, preventing dust-ignited explosions like the one that destroyed Minneapolis' Washburn A Mill in 1878.

A worker inside Honeywell Corporation. Photograph by Olof Kallstrom for the Minnesota Geographic Society, 1978. Forms part of the Olof Kallstrom series of photographs from the Minnesota Historical Society’s City of Minneapolis documentary photography collection.

Native Americans mining pipestone at Pipestone Quarry, 1893. Pipestone has been mined by Dakota people in Minnesota for generations. Photographer: unknown.