Segment of a Toastmaster advertisement, 1935. Cropped from the original. From box 6 (148.F.4.2F) of the MacMartin Advertising Agency records, 1905–1980. Manuscripts Collection, Minnesota Historical Society, St. Paul.

Segment of a Toastmaster advertisement, undated. From box 6 (148.F.4.2F) of the MacMartin Advertising Agency records, 1905–1980. Manuscripts Collection, Minnesota Historical Society, St. Paul.

Toastmaster pop-up bread toaster invented by Charles P. Strite and manufactured in Minneapolis by the Waters-Genter Company in 1921.

When 3M initially developed the adhesive for Post-It notes, they weren’t sure what to do with it. Why would any one want a product that stuck only temporarily? MN90 Producer Andi McDaniel finds out the secret behind one of this Minnesota company’s most successful products.

Fergus Falls Fire Department fire engine, ca. 1908.

Lintonite samples. Images used courtesy of the History Center of Olmsted County, Rochester.

A thomsonite-lintonite nodule from Grand Marais, Minnesota. From the Richard Hauck collection. Photograph by Wikimedia Commons user Robert M. Lavinsky before March 2010, CC BY-SA 3.0.

Lintonite within a waterworn anorthosite pebble from the north shore of Minnesota. University of Minnesota Mineral Collection. Photo by Joshua Feinberg.

Rochester Training School of Nursing, class of 1901. Dr. Laura Linton is seated in the third row, at center. Image used courtesy of the History Center of Olmsted County, Rochester.