| Collection | ABDNP University of Aberdeen, Natural Philosophy Collection of Historical Scientific Instruments |
| Object Name | discharge tube demonstration |
| Object Number | ABDNP:200123f |
| Brief Description | one tall tube with a ring anode to allow the cathode rays (electrons) to pass through; presumed to have been acquired as a set with five others |
| Dimensions | Height 350mm, Base diameter 70mm, Width 125mm |
| Materials | glass, wood, metal |
| Condition | good |
| Completeness | complete |
| Object Production Place | London (?) |
| Object Production Date | 1897-1910 |