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The Honeywell Round Thermostat

The world's most iconic home thermostat was created in Minneapolis. The Round, designed by engineer Carl Kronmiller and designer Henry Dreyfuss, was introduced in 1953 by the company then known as Minneapolis-Honeywell. The Round became both a sales mainstay and a world-renowned piece of industrial art.

Photograph of the Pietenpol Field Hangar, moved to EAA Airventure Museum Pioneer Field in 1984.

Pietenpol Field Hangar

Pietenpol Field Hangar, moved to EAA Airventure Museum Pioneer Field in 1984. Photograph by Wikimedia Commons user FlugKerl2.

Color photograph of Pietenpol Air Camper G-OHAL, Continental C90-14F powered, built 2008, flying at Old Warden on September 7, 2008.

Pietenpol Air Camper

Pietenpol Air Camper G-OHAL, Continental C90-14F powered, built 2008, flying at Old Warden on September 7, 2008. Photograph taken by Wikimedia Commons user TSRL.

Color photograph of home-built Pietenpol Air Camper (UK registration G-BUCO) at Kemble Airfield, Gloucestershire, England.

Pietenpol Air Camper

Home-built Pietenpol Air Camper (UK registration G-BUCO) at Kemble Airfield, Gloucestershire, England. Photograph taken by Wikimedia Commons user Arpingstone.

Pietenpol Airplanes

When Bernard Pietenpol started to build airplanes in his Cherry Grove workshop, he'd never actually piloted one. He only learned to fly once he had built his first plane. Nevertheless, Pietenpol's popular designs for lightweight, easy-to-construct airplanes made him the "father of the homebuilt aircraft movement."

Color photograph of Columbia Graphophone used by Frances Densmore to record American Indian music, c. 1897.

Columbia Graphophone phonograph used by Frances Densmore

Columbia Graphophone (Type AT) used by Frances Densmore to record Native American music onto cylinder records, used around 1897.

Black and white photograph of Frances Densmore with Mountain Chief who is interpreting a recording.

Frances Densmore with Mountain Chief (Sioux), Chief is interpreting a recording with sign language

Frances Densmore with Mountain Chief, a Dakota man, 1914. He is interpreting a recording for her with sign language.

Alexander P. Anderson

Alexander P. Anderson

Alexander P. Anderson, inventor of puffed grain cereals, c.1920.

Alexander P. Anderson

Alexander P. Anderson

Alexander P. Anderson with the cannon he used to invent puffed grain for cereals, 1933.

Anderson, Alexander P. (1862–1943)

In December 1901, botanist Alexander Pierce Anderson created puffed rice while experimenting with starch crystals in his laboratory. Although he did not yet realize the significance of his discovery, Anderson's new breakfast food would make him a nationally known figure and the face of a Quaker Oats advertising campaign for almost a decade.

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