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Due to the weather, the Museum is closed on Tuesday, January 27. All Tuesday programs and some Wednesday programs have been cancelled. Please check here for a full list, and check back for regular updates.

The Museum will be open on Wednesday, January 28, during regular hours, from 10 am to 5:45 pm.

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Horizontal Compass Dial (17th Century)

Horizontal Compass Dial (17th Century)

  • Exhibition Text

    • Gilded brass

      Early 17th century, France

      For orientation, a tiny compass is set in a covered box at the edge of this round dial. Hours are marked near the rim, a perpetual calendar and phases of the moon on the inner circles. The back has a sighting rule and scales of degrees to find the time of night by observing positions of certain stars.

      AMNH Hayden Planetarium Collection 2049

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