Accession No

3057

Brief Description

spherometer, by J. H. Steward, English, 2/2 19th Century

Origin

England; London

Maker

J. H. Steward

Class

weights & measures

Earliest Date

1850

Latest Date

1900

Inscription Date

Material

wood; metal (brass, steel, white metal, oxidised brass); plastic; glass; paper

Dimensions

height 57mm; diameter 45mm box length 162mm; breadth 103mm; height 96mm

Special Collection

Steward collection

Provenance

Collection purchased from member of the Steward family, 1974.

Inscription

Description Notes

Metal spherometer with three oxidised brass legs ending in steel points. White metal vertical scale attached to one leg, divided 10 - 0 - 10, numbered by 10, subdivided to 0.5. Micrometer scale on knurled brass screw, divided 0 - [100], numbered by 10, subdivided to 5.
Wooden box with fittings for two spherometers; brass hinges and metal hook fastener. Paper pasted to inside of lid of box with formula for determining radius of a sphere. Box also contains a square of glass and a plastic hand lens.

Condition fair; complete.

References

Events