Cathode ray tube with two minerals
Accession Number: 2009.ph.32
A pair of 12 cm glass bulbs are mounted on a turned wooden base. The bulbs are joined by a T-shaped glass tube that runs from the base to the bottom of each large bulb. Inside each bulb is a glass support or arm holding a mineral with small glass fingers.
FROM OLD CATALOGUE CARD: “2 12 cm glass spheres held by T-shaped glass tube; support in turned wood base; each contains white substance supported in centre by glass tube; disc shaped electrode in top of each; overall height 32 cm.”
Alternative Name: Crookes tube with two minerals
Primary Materials: Wood, Glass, Metal
Markings: Old inventory number = phy74.
Height = 32, Width = 24.5; Bulb: Diameter = 12; Base: Diameter = 12
Minerals fluoresce under bombardment of cathode rays. Possibly used for spectroscopy.
Date of Manufacture: