II. Observations of the comets of 1830 and 1831, by different observers ; also, various computations of the elements of the said comets. Collected by Baron Zach, and communicated by Mr. Snow | Zendy

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II. Observations of the comets of 1830 and 1831, by different observers ; also, various computations of the elements of the said comets. Collected by Baron Zach, and communicated by Mr. Snow

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