Fluorescent lamp began with the Geissler tube continued as even better vacuums were produced. The most famous was the evacuated tube used for scientific research by William Crookes. That tube was evacuated by the highly effective mercury vacuum pump created by Hermann Sprengel. Research conducted by Crookes and others ultimately led to the discovery of the electron in 1897 by J. J. Thomson and X-rays in 1895 by Wilhelm Roentgen. But the Crookes tube, as it came to be known, produced little light because the vacuum in it was too good and thus lacked the trace amounts of gas that are needed
Roentgen Stories Roentgen Stories Roentgen Stories is a DVD collective of four promotional videos (PVs) by popular Japanese rock vocalist Hyde. Released November 3, 2004 by Ki/oon Records and Haunted Records. It features the PVs of the three singles and additional bonus music video. All songs are from his first solo album, Roentgen. The order the videos are arranged on the DVD are coincidentally the order in which they were released. The videos are meant to be watched in a series, so that the four together tell a story, with prevailing themes of life and death and the mingling of the two.