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Updated: May 21, 2025
Some of the dust, however, having been sent to Ehrenberg of Berlin, that celebrated savant, after a microscopical examination, laid an account of his inquiry before the Akademie der Wissenschaften, in May 1844, in which he shewed that the dust, so far from being inorganic, contained numerous specimens of a species of flint-shelled animalcules, or infusoria, known as polygastrica, and minute portions of terrestrial plants.
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