Did you remember to set your watches ahead today? I still have to set my stove, my radios, and my tall case clock.
The moving chart above is a Volvelle or an early paper rotating analog computer.
Peter Apian, 1495-1552. Astronomicum Caesareum, 1540.
Houghton Library, Harvard University
2 comments:
Does anybody else miss the old fashioned clocks and watches that could be reset by twisting a little screw?
I wish they would stop all this time changing, so exhausting in the spring when you leap forward an hour.
The Volvelle is really cool, requires more thinking than a computer that's for sure. Amazing to think we sent humans into space via slide rule.
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