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History of Science Museum

Mechanical Equinoctial Dial, by Thomas Wright, London, c. 1725-1750

Inventory Number 39183


Acknowledgement: © History of Science Museum, University of Oxford, inv.39183

Item type
Object
Provenance
Presented by Lewis Evans Made for Campbell Earl of Caithness.
Primary inscriptions
"Made by Tho Wright Instrumt./ maker to His MAJESTY."
Physical material
Brass
silvered brass
Object type
Equinoctial dial
Dimensions
Height: 39mm Width: 157mm Depth: 170mm Weight: 1.2kg
Inventory No
39183
Accession Number
1924-0/part

Description

Square base plate with inset central compass (with adjustable index for variation), geared for equation of time adjustment; four levelling feet. Latitude scale 20-90° passing through centre of hinged hour ring

Case (mentioned in old label) not identified.