Chris Staecker | 1840s "Universal Calculator" Review / HowTo Lalanne's Abaque @ChrisStaecker | Uploaded August 2023 | Updated October 2024, 1 hour ago.
The Abaque, OR Universal Calculator (Compteur Universel), a very ambitious nomogram created by Léon Lalanne in 1843. It can multiply and do some other stuff.

This is episode 75 of my video series about old calculating devices.

My page about the Abaque: https://faculty.fairfield.edu/cstaecker/machines/lalanne.html

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

Smartphone lady photo by User Fairphone on Flickr, CC-BY-SA-2.0

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

#nomogram