Lost area-measuring tool

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/cstaeck...

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

The museum in London: https://collection.sciencemuseumgroup...

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

Interpretometer photo from the CIA https://commons.wikimedia.org/wiki/Fi...

"Coke can planimeter" by David Williamson from http://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