Accession No

3000

Brief Description

two military protractors, by J. H. Steward, English, 2/2 19th Century

Origin

England; London; Strand

Maker

J. H. Steward

Class

mathematics; military

Earliest Date

1850

Latest Date

1900

Inscription Date

Material

wood (boxwood)

Dimensions

both length 122mm; breadth 39mm

Special Collection

Steward collection

Provenance

Collection purchased from member of the Steward family, 1974.

Inscription

‘J.H. STEWARD
LONDON’ (reverse of both)

Description Notes

Two identical boxwood rectangular protractors with bevelled edges.
Obverse has degree scale around three sides divided [0] - [180˚] and [180˚] - [360˚], numbered by 10˚, subdivided to 1˚. Fourth side has map scale for 2 inches to 1 mile, divided 100 - 0 - 46[00] yards, numbered by 2[00], first section subdivided to 20. Centre occupied by table giving horizontal equivalent in yards for various angles, given vertical height of 1 foot. Also transversal centimetre and half-centimetre scale.
Reverse: map scale for ‘yards 2 1/2 ins = 1 mile’, divided 100 - 0 - [3700], numbered by 2[00], first section subdivided to 20. Map scale for ‘yards 1/2 inch = 1 mile’, divided 100 - 0 - [6200] yards, numbered by 1000, subdivided to 100, first section subdivided to 50. Map scale for ‘yards 1 inch = 1 mile’, divided 100 - 0 - [3200] yards, numbered by 500, subdivided to 100, first section subdivided to 20. Inch scale divided [1] - [0] - 3, numbered by 1, first inch occupied by transversal scale for division to hundredths. Metric map scale for ‘1cm = 1km’, divided 1 - 0 - 11, numbered by 1, subdivided to 0.5, first section subdivided to 0.05. Set of conversion factors also marked.

Condition 3000.1 fair (singed?), 3000.2 good; complete.

References

Events