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0460000628

Telling time at night using a nocturnal. The hour is obtained by measuring the angular position of the imaginary line joining the 'pointers' in the constellation of the Plough to the Pole Star. From Peter Apian 'Cosmographia', Antwerp, 1539

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Telling time at night using a nocturnal. The hour is obtained by measuring the angular position of the imaginary line joining the 'pointers' in the constellation of the Plough to the Pole Star. From Peter Apian 'Cosmographia', Antwerp, 1539