Inventions shown at the Exposition Universelle in Paris (1867 or 1878): a set of measuring devices for a meteorological station, a metal dish, and a table clock. Wood engraving.

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Inventions shown at the Exposition Universelle in Paris (1867 or 1878): a set of measuring devices for a meteorological station, a metal dish, and a table clock. Wood engraving. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.