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History of Science Museum

Horizontal String-Gnomon Dial with Moondial, German, c.1700

Inventory Number 35301


Acknowledgement: © History of Science Museum, University of Oxford, inv.35301

Item type
Object
Provenance
Presented by Lewis Evans in 1924.
Other inscriptions
In the case is a Lewis Evans green tag numbered 399, rather than the 299 given on OGN under the Title tab. Presumably this is an original number that LE subsequently revised
Physical material
Gilt and silvered brass
Object type
Horizontal dial
Dimensions
Width: 68mm Depth: 72mm
Inventory No
35301
Accession Number
1924-0/part

Description

Octagonal base with decoratively engraved upper surface on which is a separate brass dial plate with Roman numerals IIII - XII - VIII and the inscription "Horicontali & Solis" [sic]. The lack of command of Latin is reinforced by the scale of the age of the moon which is labelled "Æatis Luna". On a separately rotating ring within, which carries a small arrow pointer, is the scale of hours I - XII, I - XII. The arrow is fixed at VI rather than XII so the adjustment for time by the moon would have been incorrect. The sprung upright for the string gnomon retains both string and plummet, and has holes marked for latitudes 46, 48, 50, 52 and 54 (though only one hour scale and no means of inclination). Leather-covered case, with interior moulded to accept the three feet.