Accession No

2445

Brief Description

resistance box, by Cambridge Scientific Instrument Company Ltd., English, 1908

Origin

England; Cambridge

Maker

Cambridge Scientific Instrument Company Ltd.

Class

electrical

Earliest Date

1908

Latest Date

1908

Inscription Date

Material

wood; metal (copper, brass); plastic (ebonite)

Dimensions

length 384mm; breadth 340mm; height 310mm

Special Collection

Provenance

Transferred from Department of Physical Chemistry, University of Cambridge, Cambridge, England, 1978.

Inscription

‘THE CAMBRIDGE SCIENTIFIC INSTRUMENT CO. LTD.
CAMBRIDGE. ENGLAND.
No. 7258
TO CARRY 5 AMPERES
MANGANIN’ (on top)

Description Notes

Rectangular wooden box containing copper tank for oil; ebonite top; five brass terminals; central stirrer for oil mounted on top, with pulley for belt drive, and arrow showing direction of rotation; three circular holes, with ebonite plugs; twenty coils wound on brass tubes, and cylindrical brass stirring mechanism (Archimedes’ screw) fastened to underside of top plate.

Condition: fine; complete.

References

Events