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History of Science Museum

Plane-Table Alidade, by Humfrey Cole, London, 1580?

Inventory Number 47108


Acknowledgement: © History of Science Museum, University of Oxford, inv.47108

Item type
Object
Provenance
Purchased.
Primary inscriptions
"H + Cole + 1580 [?] +" on reverse (see note on dating)
Physical material
Brass
Object type
Alidade
Dimensions
Height: 0.3cm Width: 44.4cm Depth: 2.4cm Weight: 0.3kg
Inventory No
47108
Accession Number
1980-22

Description

Along one edge there is a scale of 17 inches divided to 1/8ths; along the other edge are inches subdivided into equal parts. There are two threaded holes near the middle which were presumably for fixing on a sighting device.