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Inventory no. 36500 - Former Display Label

?17th century.

Brass and marble. Signed, "P.M.P.R."; undated.

The hour-ring of the globe is set in the plane of the equator with the 12-12 diameter in the meridian. The brass strip is then turned until it is directed towards the sun, when its position will give the time.

The circles on the base were used with a lunar volvelle, now missing, to convert readings taken by moonlight into solar time.

Purchased, in 1952, for the Lewis Evans Collection.

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