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The Royal Society: Science in the Making

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Showing 1 letter from 1731–1731

1 letter from John Hadley; 0 letters from Cromwell Mortimer

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States that he needs to see Edmond Halley's instrument, made in 1692, to determine whether it is similar to his own invention

07 October 1731 Sender: John Hadley Reference number: EL/H4/24