Accession No

2224

Brief Description

periscope, by A. Kershaw and Son Ltd., English, 1917

Origin

England; Leeds

Maker

A. Kershaw and Son Ltd.

Class

optical; surveying

Earliest Date

1917

Latest Date

1917

Inscription Date

1917

Material

metal (alloy); glass

Dimensions

length 295mm; breadth 190mm; height 395mm

Special Collection

Provenance

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

Inscription

‘PERISCOPE No 31. A Kershaw & Son Ltd
LEEDS 1917 No 30’ (on shaft)

Description Notes

Metal alloy. Khaki finish. Square shaft with window and cross hairs. Diagonal mirror and sighting tube at base of shaft. Moves over scale of elevation and depression graduated 10-0-10 and azimuth scale graduated 40-0-40 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