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.

Ronning road planer prototype

Ronning road planer prototype

Ronning road planer prototype, undated.

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 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

Patented in 1915, the ensilage harvester improved on standard practices for harvesting and storing crops, and streamlined farm work. Its basic design, largely unmodified, is still used by agricultural implement companies worldwide.

Wheat harvest at G.S. Barnes and Company farm

Wheat harvest at G.S. Barnes and Company farm

Wheat harvest at G.S. Barnes and Company farm in Glyndon (Clay County), c.1878.

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