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A treatise on the various lengths of the days, nights and twilights : with tables of latitude and longitude of the most eminent towns, harbours, headlands, and islands in the world ... / by Richard Mihill.

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Spherical astronomy

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A treatise on the various lengths of the days, nights and twilights : with tables of latitude and longitude of the most eminent towns, harbours, headlands, and islands in the world ... / by Richard Mihill.