Accession No

1958 (?)

Brief Description

vacuum tube, 1875-1925

Origin

Maker

Class

physics

Earliest Date

1875

Latest Date

1925

Inscription Date

Material

glass; metal (white metal); wax (sealing wax)

Dimensions

height 235mm; breadth 60mm; depth 50mm

Special Collection

Provenance

Inscription

Description Notes

Glass vacuum tube with pear-shaped central chamber and swansneck evacuation tube near narrow end of chamber. Two small electrodes, one in side arm, the other a disc set in narrow end of central chamber. Centrally-positioned target consists of white metal disc with small central aperture. The Wide end of the chamber is blackened from use.

Condition good; complete.

References

Events