Accession No

4433

Brief Description

table spectrometer, by John Browning, English, c. 1880 - 1890

Origin

England; London

Maker

Browning, John

Class

optical

Earliest Date

1880

Latest Date

1890

Inscription Date

Material

metal (brass, silver); glass; wood

Dimensions

box height 450mm; breadth 425mm; depth 377mm

Special Collection

Provenance

Transferred from the Department of Engineering, University of Cambridge.

Inscription

‘John Browning, London.’ (on circular stage)
‘Position of Collmtr for 2 Prisms’ (on stage)
‘Position of Collmtr for 1 Prism’ (on stage)
‘Position of Collmtr for 5 Prisms’ (on stage)
‘Position of Telescope’ (on stage)

Description Notes

Table spectrometer, by John Browning, English, c. 1880 - 1890.

Brass table spectrometer. Brass collimator tube with threaded joint, screws into mount which pivots about centre, with clamp. Brass telescope, rack and pinion focus, with threaded joint, screws into mount with clamp and slow motion screws and vernier. Circular stage with silvered scale, 0-360 degrees subdivided to 10’. Third mount for magnifying glass for vernier (? - magnifying glass missing) moves around scale. Tripod platform with upper platform with mounts for five prisms. Brass pillar stand with flat tripod base and three brass feet secured to wooden base. Comes in a wooden case.

Condition: fair (brass is part-oxidised; rack and pinion on telescope damaged); incomplete (no prisms; eyepieces for telescope and slit for collimator missing).

References

Events