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Set of Three Tralles Hydrometers, by Erich Koellner, Jena, Early 20th Century?

Inventory Number 44518

Acknowledgement: © History of Science Museum, University of Oxford, inv.44518

Subject
Chemistry
Item type
Object
Provenance
Presented by Mrs Elizabeth Prior in 2003, from the estate of her father, Dr Desmond Kay, formerly of the Sir William Dunn School of Pathology, Oxford.
Primary inscriptions
On band inside lid of case: "Erich Koellner, Jena / Glastechnische Anstalt". On each scale, in various configurations, "Tralles Tp 15°C D.R.G.M."
Object type
Hydrometer
Dimensions
Height: 23mm Width: 123mm Depth: 67mm Weight: 68g
Inventory No
44518
Accession Number
2003-4/3

Description

Three small mercury-loaded glass hydrometers with printed paper scales, in fitted wooden case lined with yellow felt. The scales" range coverage is 30-50, 50-75, 75-100.

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