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Cathode Ray Tube with One Mineral


A black turned wooden base with a glass tube apparatus mounted on it. The glass tubing is approximately 25cm tall with a 3.5cm projection from the side of the tubing and this projection contains an electrode. At the top of the tubing there is also an electrode and inside the tubing there is a grey mineral piece supported near the electrode.

Accession Number:

Alternative Name: Crooke’s Tube

Primary Materials: Glass, Wood, Unidentified Mineral


Dimensions (cm):

Height = 35.5, Width = 9.5, Length = 11.5



Associated Instruments:


Date of Manufacture:


This artifact was part of a collection of electrical instruments (mostly brass electrometers and ballistic galvanometers) gathered by University of Toronto Professor of Physics Martin J.G. Lee (d. 2009). The collection was likely acquired from Dr. Lee’s office c. 2010 or 2011.

Additional Information and References:

Historical Notes: