Accession No

6487

Brief Description

circular slide rule, ‘Lord’s calculator’, by Elliott Brothers, English, c. 1880

Origin

London; England

Maker

Elliott Brothers

Class

calculating

Earliest Date

1880

Latest Date

1880

Inscription Date

Material

wood (ebony and one other); glass; metal (brass; steel; one white metal)

Dimensions

380mm (width)

Special Collection

Provenance

Purchased from Bonham’s Knightsbridge, Montpelier Street, London, SW7 1HH. Lot number 82, Fine Mechanical Music and Scientific Instruments, Wednesday 3/11/2010.

Inscription

LORD’S
CALCULATOR

ELLIOTT BROs
LONDON
No 39

Description Notes

Large case with hinged felt-lined lid; circular slide rule operated by two handles (stored in fitted compartments in the lid); outer scale marked ‘prices’, runs 10–9.5; next scale in marked ‘values’ and ‘widths & ends’, runs 100 C–95; next scale in marked ‘counts’ and ‘lengths’ runs 100 B–95; innermost scale marked ‘reeds & picks’ and ‘percentages’ runs 120–60. Functioning lock with key (though the case doesn’t close cleanly).

Condition: good; complete.

References

Events