Accession No

1948

Brief Description

vacuum tube, 1900–1950

Origin

Maker

Class

physics

Earliest Date

1900

Latest Date

1950

Inscription Date

Material

glass; metal (white metal); stone (red mineral)

Dimensions

length 171mm; maximum diameter 31mm

Special Collection

Cavendish collection

Provenance

Transferred from the Cavendish Laboratory, University of Cambridge, in 1974.

Inscription

‘Crookes Radiant Matter Tube
3 inch Spark No 4
L Casella London’ (etched into side of tube)

Description Notes

Cylindrical vacuum tube with swan’s neck side-arm evacuation tube. One terminal with disc ending, the other set on side of tube. Spherical white glass target (broken) embedded with chips of a red mineral.

Condition fair (target broken); complete.

References

Events