X-Ray Tube


Accession Number: 2009.ph.31


A long glass bulb mounted horizontally on a wooden stand by copper wires. Disc shaped electrodes project horizontally from either end, with a short projection at the bulbous end containing an additional electrode.

Alternative Name: Vacuum tube

Primary Materials: Metal, Wood, Glass


Old inventory number = phy61. Labelled on the glass projection is a partly illegible label, reading “Richard Muller-…, 30”.

Dimensions (cm):

Height = 30, Width = 7.5, Length = 28; Bulb Diameter = 15


X-Ray Tube likely with an early medical application.


Associated Instruments:

Manufacturer: Richard Muller-Uri (Braunschwieg)

Date of Manufacture: c. 1910


Historical Notes:

This X-Ray tube was made for classroom demonstrations around 1910 by Richard Müller-Uri, whose company had quickly entered the rapidly growing discharge and x-ray tube market at the beginning of the 20th century. This glass of this example is has a distinctly purplish tint, indicating that it has been well used.