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Cathode Ray Tube


A black turned base with a glass tubing, approximately 13.5cm tall, attached to the base. On both ends of the glass tubing there is a bulb containing electrodes.

Accession Number:

Alternative Name:

Geissler Tube; Crookes Tube; vacuum tube

Primary Materials: Metal, Wood, Glass

Markings: Old inventory number = phy64.

Dimensions (cm): Height = 19, Diameter = 7.2


Fluoresces under electrification. Possibly used for spectroscopy.


Associated Instruments:


Date of Manufacture:

Provenance: Collection of Dr. Martin Lee.

Additional Information and References:

Historical Notes:

Geissler tubes are produced by mixing various substances in with glass or by containing different gasses within the tubes. The tubes fluoresce under electrification. Geissler tubes are often skillfully blown with the aesthetics of the glass work taken into account.