It finds the derivative: The Ott Derivimeter (1930s) @ChrisStaecker
It finds the derivative: The Ott Derivimeter (1930s) @ChrisStaecker
Uploaded January 2025 | Updated September 2026, 2 weeks ago
The Ott Derivimeter, an instrument for finding the derivative of a curve drawn on paper. Sold by the Ott company in the early 20th century, though I don't know when mine was made.

This is episode 84 of my video series about old calculating methods.

OTT Hydromet company history video: youtube.com/watch?v=lgax3bnP-RE

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

#calculus #elsa
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Chris Staecker |

It finds the derivative: The Ott Derivimeter (1930s)

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