M0017336: Large, brass equinoctial ring-dial, c.1650

Previous title, replaced October 2020: Equinoctial ring-dial

Photograph of one side of a large, brass equinoctial ring-dial signed in Russian "A.C. Toblhanhb Mockba" [A.S. Trinidin, Moscow]. Undated. It has inscriptions on dials (some of numerical inscriptions and the names of the signs of the Zodiac are duplicated in Arabic, using Abjad for the numerals) also the calender scale which may compensate for the equation of time. It was acquired by the Wellcome Historical Medical Museum at an unknown point and accessioned in 1924 (accession number R15475). It is not held by Wellcome Collection. Related images: M0017335, M0017337

April 1959

1 photograph glass plate negative; 10.2 x 12.7 cm

Wellcome Collection holds the accession register which provides an entry for the item: R15475

Copyright is held by Wellcome Collection

Catalogue data comes from a combination of entries in the original glass plate registers, metadata created when the glass plates were digitised in the early 2000s and enhancements made by the cataloguer in 2022.

Please consult the digitised version as this item is fragile. Email library@wellcomecollection.org to request access to the physical item.