The H.M.S. Beagle Stormglass.
This is the stormglass, a mysterious device used to predict weather since 1750, and employed by Admiral FitzRoy, captain of the H.M.S. Beagle, when he and his lieutenant, Charles Darwin, voyaged to the coast of South America and the Galapagos Islands in 1831 to conduct a hydrographic survey for commerce and naval expeditions by the British Royal Navy.
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