File:Geissler tubes at Spark Museum.jpg
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Summary
| Description |
English: Geissler tubes from late 1800s displayed at the SPARK Museum of Electrical Invention, Bellingham, Washington, USA. Invented by German glassblower and physicist Heinrich Geissler in 1857, Geissler tubes were the first gas discharge tubes and were made in many fanciful shapes for entertainment. When high voltage from an induction coil was applied between the metal electrodes at the ends of the tube, they lit up with many glowing colors. Around 1910 they evolved into the first neon lights. Photo altered using Gimp to remove reflection from glass front of display case. This resulted in the left and right side of image having slightly different color tones. |
| Date | |
| Source | Own work |
| Author | Chetvorno |
| Permission (Reusing this file) |
Oral permission for photography was given by admissions employee of Spark Museum. |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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Licensing
I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:56, 7 November 2018 | | 3,536 × 1,912 (1.51 MB) | Chetvorno | Increased contrast |
| 01:44, 23 October 2018 |  | 3,536 × 1,912 (1.36 MB) | Chetvorno | User created page with UploadWizard |
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