517 of 520
Sorted by:
Instrument type

Vertical Disc Dial
Dated 1564; German
Gilt copper; 50 mm in diameter

The instrument is very similar to Epact 86254. It is composed of five copper superimposed discs, the central of which has a handle in the form of a double dragon's head. On one side of the dial is a brass arm with a pierced and engraved lunar volvelle, showing the phases of the moon. There is also a perpetual calendar, showing the total days of the current month, the length of the night and of the day and the ruling planet for the current day.

On the other side of the dial is a folding gnomon indicating unequal hours.

There are some engravings on the sides of the plates which are not visible when the instrument is assembled.

Museum of the History of Science, Oxford
Inventory number 41123

© Museum of the History of Science, Oxford. All rights reserved. Information and images provided here may not be reproduced in any form or by any means without the prior written permission of the museum.

Basic URL:

|| Introduction || Essay || Museums || Bibliography || Conventions || Credits || Privacy || Help ||
|Catalogue entries |Handlist || Makers || Places || Articles || Glossary || Search || Home ||