Chris Staecker | 1920s Radial Planimeter Review / HowTo @ChrisStaecker | Uploaded September 2023 | Updated October 2024, 2 hours ago.
A K+E Radial Planimeter, from 1920s. It measures the average radius of a roughly circular shape!

This is episode 76 of my video series about old calculating devices.

Radial planimeter instructions: archive.org/details/radialinstructions

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

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