Cathode ray tube with coral


Accession Number:


A large pear shaped glass bulb is attached vertically to a turned wooden base. There is a tall glass arm or stand inside of the bulb which holds a pink mineral, likely coral. Near the bottom of the bulb, a perpendicular glass tube containing an electrode projects outward. At the top of the inside of the main glass bulb is another electrode with a metal disk attached via a short metal rod.

Alternative Name: Crookes Tube with coral

Primary Materials: Wood, Metal, Glass

Markings: Old inventory number = phy26.

Dimensions (cm): Height = 51 cm, Diameter = 12.5 cm


Coral fluoresces under bombardment of cathode rays. Possibly used for spectroscopy.


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