Horizontal Compass Dial (Bronze)
Gilded brass, enamel, glass
Early 19th century, China
In place of the marked circle used on many European dials, this dial has hours marked on arc. The shadow-casting pin, held by a spring, can be folded down. A spirit level on top and leveling screws at the four outer points help ensure horizontal placement.
AMNH Hayden Planetarium Collection 2083