Uploaded November 2022 | Updated September 2026, 1 week ago

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The Adisco Area Measurer, made by Advertising Displays Incorporated, probably in the 1950s.

This is episode 64 of my video series about old calculating devices.

Downloadable and printable version: https://faculty.fairfield.edu/cstaecker/machines/adisco.html

The museum in Australia: https://collection.maas.museum/object/383315

The museum in London: collection.sciencemuseumgroup.org.uk/objects/co59908/adisco-area-measurer-area-measurers

"Strip method" picture from "Maps And Diagrams" by Monkhouse & Wilkinson, 3rd edition 1971, page 74.

Interpretometer photo from the CIA commons.wikimedia.org/wiki/File:Austin_Photo_Interpretometer_(Stereoscope)_(30579646380).jpg

"Coke can planimeter" by David Williamson from durealeyes.com/planimeter.html

Adiscope photo from ebay listing by ebay user bayareasurplus

Viewmaster photo from Wikimedia user ThePassenger, CC-BY-SA-3.0

End song inspired by "Hotter than a Molotov" by The Coup.

Chris Staecker webarea: https://faculty.fairfield.edu/cstaecker/

#ratchet #planimeter