Epact Scientific Instruments of Medieval and Renaissance Europe

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Equinoctial Dial
Signed by Charles Whitwell
Dated 1606; London
Gilt brass; 62 mm in diameter

In addition to its universal equinoctial dial, this instrument has calendrical tables and a lunar volvelle with an aspectarium. The compass needed to orient the dial in use has a hand-coloured compass card printed from an engraved plate. The instrument's cover is in the form of a ring to enable the compass to be seen even when the instrument is closed.

This compact design of equinoctial dial was used by a number of English makers of the early 17th century.

Museum of the History of Science, Oxford
Inventory number 44225

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