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Polymath 525

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oldham1 | 12:00 Sat 31st Oct 2009 | Quizzes & Puzzles
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G I joe's other half (5,3,7) r-s--/---/--v-t-r

Device to measure wavelengths (6) ----o-
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1) Rosie the Riveter
The device to measure wavelengths is ETALON
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Thanks to you both.

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Polymath 525

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