Epact Scientific Instruments of Medieval and Renaissance Europe

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Diptych Dial
Signed by Georg Karl
Dated 1598; German
Gilt brass; 104 x 88 x 12 mm

This instrument, which has also been called a compendium, consists of four sundials, a lunar volvelle, a horary volvelle, a compass, a plumb level and an astronomical table.

The two horizontal pin gnomon sundials are (inexplicably) very similar to each other and there is also both a vertical and a horizontal string gnomon sundial.

The dial appears to be the only surviving instrument by Georg Karl.

Museum of the History of Science, Oxford
Inventory number 47563

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