Micrometer by Troughton and Simms, used by the 1874 Dutch expedition on Reunion

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Micrometer by Troughton and Simms, used by the 1874 Dutch expedition on Reunion

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The director of the Leiden Observatory, Frederik Kaiser, bought this micrometer after Airy in 1858. The micrometer was lent to the 1874 expedition to Reunion.

Troughton & Simms, London, 1858

Museum Boerhaave V6132

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