Science and Technology | Page 5

MN90: Mr. Cool

In this segment of MN90: Minnesota History in 90 Seconds, Britt Aamodt looks at Frederick McKinley Jones, the inventor of the refrigerated truck.

Animal trap

Steel animal trap created in New York between 1800 and 1900.

Control Data’s CDC 160 computer

Control Data’s CDC 160 computer, 1965.

Trade-show booth for Howard’s Industrial Catering

Restaurant trade-show booth for Howard’s Industrial Catering, displaying patented heated food carriers and advertising the Operation Leap Frog feeding program, ca. 1960s. Oscar C. Howard papers, 1945–1990, Cafeteria and Industrial Catering Business, Manuscripts Collection, Minnesota Historical Society.

Patent application for Heated Dinner Transport Apparatus

Drawing to accompany application for United States Patent 3,129,317, awarded to Oscar Curtis Howard on April 14, 1964, for Heated Dinner Transport Apparatus. Oscar C. Howard papers, 1945–1990, Cafeteria and Industrial Catering Business, Manuscripts Collection, Minnesota Historical Society.

Barberry Eradication Program, 1918–1980

Begun in 1918 and active until the late 1970s, the Barberry Eradication Program was an unprecedented cooperative effort between the US Department of Agriculture and twelve US states to remove the invasive common barberry bush from major areas of wheat production in the United States. The common barberry bush was a problem because it is a secondary host for the fungus that causes stem-rust disease, the most devastating disease of wheat. Minnesota played the central role in the establishment and operations of the eradication program.

Map of the Interstate 94 corridor

Map of the Interstate 94 corridor, 1965. From Alan A. Altshuler’s The City Planning Process: A Political Analysis (Ithaca, NY: Cornell University Press, 1965). Used with the permission of Cornell University Press.

Worker pointing to collapsed Interstate 35W bridge

A worker points to a section of the collapsed I-35W bridge on August 3, 2017. Photograph by Kevin Rofidal (Edina Police Department).

I-35W bridge (Bridge 9340) component

A truss and gusset plate remnant (U10-U11W truss) recovered after the I-35 W Mississippi River Bridge collapse on August 1, 2007. This remnant is from the U10 and U11 truss nodes which were identified by the National Transportation Safety Board (NTSB) as a likely initiation site for the bridge failure.

I-35W wreckage

View of the I-35W bridge wreckage in the Mississippi looking through the arches of the Tenth Avenue bridge in Minneapolis. Photograph by Kevin Rofidal (Edina Police Department), August 4, 2007.

Gale Family Library