Accession No

1949

Brief Description

vacuum tube, c.1885

Origin

Maker

Class

physics

Earliest Date

1885

Latest Date

1885

Inscription Date

Material

glass; metal (brass, white metal); paper; stone (mica (?))

Dimensions

length 225mm; breadth 92mm; depth 46mm

Special Collection

Cavendish collection

Provenance

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

Inscription

Description Notes

Glass vacuum tube containing paddle wheel with 8 mica paddles, which moves within glass runners along the length of the tube. Side arm at each end carries wire connection to terminals which consist of white metal discs set in line with the upper part of the paddle wheel.
Paper label marked ‘27/6’.

Condition good; complete.

References

Events