Cathode ray tube with five minerals

Physics

Accession Number: 2009.ph.28

Instrument Name: Cathode ray tube with five minerals

Description:

A 26 cm glass bulb mounted on a wooden collar stemming from a wooden base. The bottom half of the bulb is narrow, 7 cm in diameter, and the top half is spherical, coming to a point with a metal (copper?) cover on top. Halfway up the first, narrow part of the bulb is a short, 5 cm projection with an electrode in it. Inside the large bulb are five different minerals secured in glass fixtures.

Alternative Name: Crookes tube; Fluorescing tube

Primary Materials: Metal, Wood, Glass

Markings: Old Inventory Number = phy76

Dimensions (cm):

Height = 35, Base Diameter = 14, Bulb Diameter = 14

Function:

Minerals fluoresce under bombardment of cathode rays. Possibly used for spectroscopy.

Condition:

Associated Instruments:

Manufacturer:

Date of Manufacture:

Provenance:

Donated to UTSIC: No

Historical Notes:

Likely built by Richard Muller-Uri (Braunschweig)