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
Wilhelm Loewenthal Moisés Ville, the first colony of the JCA. It has been proven by banking records that Lowenthal died in Berlin two years later, after leaving Brussels. In the colony, Lowenthal's name graces the principal thoroughfare. Wilhelm Loewenthal Wolff Wilhelm Lowenthal ( – ) was a Polish-born, naturalized French Doctor of Medicine. Born in Rybnik, Poland, after graduating from the University of Berlin, Lowenthal (or Löwenthal, with the umlaut), went to the Caucasus to continue his medical research. At the same time, he was Professor at the University of Geneva, in its branch at the Lausanne, Switzerland. He corresponded regularly with