The Gerbert abacus, designed by Gerbert d'Aurillac in the late 900s AD. It's a counting board with counters marked with arabic numerals.
This is episode 43 of my series about antique calculating devices.
Chris Staecker webarea: cstaecker.fairfield.edu/~cstae...
End song inspired by "Hotter Than a Molotov" by The Coup.
#math #abacus #gerbert
Негізгі бет Gerbert Abacus Review / HowTo
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