Русский: Иллюстрация к статье Гейслеровы трубки 1-го издания Большой советской энциклопедии Рис. 2. English: Figure from Гейслеровы трубки article of Great Soviet Encyclopedia, 1st edition
Glow lamps, similar to neon lights, invented by Nikola Tesla and powered by one of his compact Tesla coils. The lamps, consisting of partially evacuated glass tubes with electrodes at either end, are similar More
Geissler fluorescence tubes
Geissler tube of four compartments
Color drawing of Geissler tubes lit by their own light, from an 1869 French natural philosophy book, showing some of the many fanciful shapes and colors. They were powered by high voltage from an induction co More