Cathode ray tube with one mineral
Accession Number: 2009.ph.244
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 glass bulb which holds a large pink mineral with a blue underside. Nearer the bottom of the bulb is a perpendicular glass tube with an electrode inside it. At the top of the inside of the glass bulb is another electrode with a metal disk attached via a short metal rod.
Alternative Name: Crookes Tube with one mineral
Primary Materials: Wood, Metal, Glass
Markings: Old inventory number = phy79.
Dimensions (cm): Height = 40.5, Diameter = 15.5
Minerals fluoresce under bombardment of cathode rays. Possibly used for spectroscopy.
Date of Manufacture: