Epact: Nocturnal unsigned, dated 1588

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Nocturnal
Unsigned
Dated 1588; French
Gilt brass; 52 mm in diameter

This instrument consists of a nocturnal and a horizontal dial for a latitude of circa 49?. A volvelle allows the dial to be used as a moondial and for the conversion of lunar time into solar time.

British Museum, London
Registration no. MLA 1891,8-3.1

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Epact Scientific Instruments of Medieval and Renaissance Europe