The Cathode Ray Tube Site

By Miss Cellania in Science & Tech on Jun 27, 2008 at 9:16 am

Between 1850 and 1950, most electronics used glass vacuum tubes, such a cathode ray tubes (CRT). Henk Dijkstra has an extensive collection of such tubes on 28 pages, with the history behind them. Pictured is a liquid-filled Geissler tube, designed by Johann Heinrich Wilhelm Geissler in Germany in the early 20th century. Link -via Everlasting Blort