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March 8, 2017

Cornelius Slide Rule

Filed under: Item of the Day — Jason Onerheim @ 12:01 am

A plastic slide rule “Pre-Mix Computer” produced and marketed by the Cornelius Company of Minnesota after 1956. The ruler allows the user to set a particular volume of carbon dioxide gas on one side of the ruler, and then relate gauge pressure (measured in pounds per square inch) with beverage temperature (in degrees F). The gauge was part of the company’s pre-mix beverage distribution system, that distributed beverages in large tanks ready to dispense.

For more information or to purchase a photograph of this item, view this slide rule in our collections database.

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