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dtgk 29-3-08 in The AnswerBank: Quizzes & Puzzles
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dtgk 29-3-08

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Clothahump | 11:34 Sat 29th Mar 2008 | Quizzes & Puzzles
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36 Down.
Signalling device using a moving mirror to reflect sunlight in a series of flashes.
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Heliograph
36 down . heliograph
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Thank You very much. :)

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