Accession No

1473

Brief Description

adjustable cross head and compass, by W. and S. Jones, English, 1800 (c)

Origin

England; London

Maker

W. and S. Jones

Class

surveying

Earliest Date

1800

Latest Date

1800

Inscription Date

Material

metal (brass, steel, white metal); stone (agate); plastic (perspex)

Dimensions

diameter 76mm; height 100mm; compass diameter 54mm

Special Collection

Provenance

Donated by 23/10/1970. Acquired by donor c. 15 years before donation.

Inscription

‘W. & S. Jones
London.’ (on compass face)

Description Notes

Brass cylinder pierced with 4 vertical slits. Sights set mutually at right angles. Milled head rotates cylinder over a graduated base [0] - 360 numbered by 10 subdivided to 1. Vernier scale on cylinder reads to 5’ of arc. Cylinder on base, with clamp, for attachment to tripod. Screw on cover for compass. Compass with silvered 8 point rose graduated [0] - [90] - [0] twice, numbered by 10 on lower scale and [0] - 360 numbered by 10 subdivided to 1 on upper. Small roundel of blue/grey agate in centre of steel needle. Locking bar.

Condition fair (very tarnished); complete

References

Events