Black and white photograph of Theresa Ericksen promoting Christmas Seals in the battle against tuberculosis, ca. 1924.

Theresa Ericksen promoting Christmas Seals

Theresa Ericksen promoting Christmas Seals in the battle against tuberculosis, ca. 1924.

Black and white aerial photograph of the Thermo King Corporation campus in Bloomington as it appeared, c.1960.

Thermo King Corporation

The Thermo King Corporation campus in Bloomington as it appeared, c.1960.

Black and white dagram of the Thermo King Model A included in Frederick M. Jones’ 1939 patent application to the U.S. Patent and Trademark Office.

Thermo King Model A

Diagram of the Thermo King Model A included in Frederick M. Jones’ 1939 patent application to the U.S. Patent and Trademark Office.

Thermo King Model C

Thermo King Model C

Front component of a Thermo King Model C. Image is from the Frederick Jones papers (1910–[196-]), Mansucripts Collection, Minnesota Historical Society, St. Paul.

Thermo King Model C

Thermo King unit

Thermo King unit, c.1960. Image is from the Frederick Jones papers (1910–[196-]), Mansucripts Collection, Minnesota Historical Society, St. Paul.

Thermo-Fax copying machine, 1958. The Thermo-Fax was the first photocopier marketed in the United States. While it has since been made obsolete by more advanced products, it had major impacts on office communication.

Thermo-Fax copying machine

Thermo-Fax copying machine, 1958. The Thermo-Fax was the first photocopier marketed in the United States. While it has since been made obsolete by more advanced products, it had major impacts on office communication.

Citizens State Bank, Thief River Falls, ca. 1939

Thief River Falls

Citizens State Bank, Thief River Falls, ca. 1939

Thimble

Thimble

This metal thimble was found in 1968 during excavation of the sutler’s store at Historic Fort Snelling. Thimbles appear in the store's inventories from the 1830s. They could have been used by the women at the fort (laundresses, domestic servants, enslaved women, and officers' wives) or by the company tailors.

Thinsulate sample, 1987. The material, a moveable thermal layer, revolutionized the active outerwear industry.

Thinsulate sample

Thinsulate sample, 1987. The material, a moveable thermal layer, revolutionized the active outerwear industry.

Black and white photograph of a Farm Bureau workshop, 1960.

Third annual Ninth District Farm Bureau Women’s workshop

Third annual Ninth District Farm Bureau Women’s workshop at the Winter Shows, 1960. First row: Mrs. Daby, Strickler, Jobe, Thorsen. Second row: Mrs. Pyle, Mattson, Thureen, Hanson, Jurchen, Wm. Strickler, Geddes, Peterson. Third row: Mrs. Dragseth, Theo, Thureen. Fourth row: Mrs. Gorter, Wallin, W. Ross, Thorsen.

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