Pacific Science Center Camp-In, Part 9
For one dollar you get a big piece of glossy paper and five minutes on the “Harmonograph,” a heavy pendulous platform with a pen on a solidly fixed arm:

Josh Poulson
Posted Wednesday, May 3 2006 07:30 AM
For one dollar you get a big piece of glossy paper and five minutes on the “Harmonograph,” a heavy pendulous platform with a pen on a solidly fixed arm:

Josh Poulson
Posted Wednesday, May 3 2006 07:30 AM
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