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Marble Adding Machine

http://www.livephysics.com/forums/viewtopic.php?f=24&t=647

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Marble Adding Machine

PostPosted: June 25th, 2007, 12:56 pm
by PHY
It's really amazing watching how computers worked before we were able to use electricity. This machine would provide a great lesson to children who would like to know the history of the computer.

[youtube]http://www.youtube.com/watch?v=GcDshWmhF4A[/youtube]

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