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 The sweeping ballads of Roentgen mask a much more solemn message. An interesting note is that the cover of the Evergreen single features one rose. Angel's Tale features two tulips. Continuing in this pattern, Shallow Sleep, the third single released should have three lilies but instead, the single's cover clearly depicts four lilies. Two theories are possible: The first theory is more likely, though, due to the arrangement of the videos on the DVD and the progression of the story told through them. Roentgen Stories Roentgen Stories is a DVD collective of four promotional videos (PVs) by popular Japanese rock