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To plot the curves, I built this trammel, which uses a left-over cement footing and three cans of paint to keep it balanced while it's being swung. Clamps allow the length of the trammel to be adjusted. September 2002.
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To plot the curves, I built this trammel, which uses a left-over cement footing and three cans of paint to keep it balanced while it's being swung. Clamps allow the length of the trammel to be adjusted. September 2002.
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