Uploaded March 2026 | Updated September 2026, 1 week ago

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The Quincunx model WD-7, made by the Lightning Calculator Company, probably in the 1980s? This is episode 93 of my video series about old calculating instruments.

The Galton Board: Math In Motion documentary: youtube.com/watch?v=9QuPHf1xi-4

End song inspired by "Hotter than a Molotov" by The Coup. youtu.be/X8AW7PmsxAY

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