Accession No

2561

Brief Description

periscope, by A. Kershaw and Son Ltd., English, 1918

Origin

England; Leeds

Maker

A. Kershaw and Son Ltd.

Class

surveying; optical

Earliest Date

1918

Latest Date

1918

Inscription Date

1918

Material

metal (alloy); glass

Dimensions

length 300mm; breadth 190mm; height 400mm

Special Collection

Provenance

Transferred from Department of Geography, University of Cambridge, Cambridge, England, 05/1969.

Inscription

‘Periscope No 31 A Kershaw & Son Ltd
Leeds 1918 No 216’ (on shaft)

Description Notes

Metal alloy. Khaki finish. Square shaft with window and cross hairs. Diagonal mirror and sighting tube. Moves over scale of Elevation and Depression graduated 10-0-10o and azimuth scale graduated 40-0-40o, both to 1o. Indicator arm for azimuth scale cogged from base of shaft. Two bubbles with mutually perpendicular axes. 3 levelling screws on a framework base.

References

Events