Puluj phosphorescent lamp, marked: "P1B10". Two electrodes including large circular cathode. External loops connect to power source. Slanted phosphorescent screen illustrates the extent of dark space (cathode ray penetration) by phosphorescent patch for a moderate vacuum and the straight line properties of cathode rays under normal conditions from cathode surface for higher vacuum. Magnetic deflections noticeable. Crookes interpreted these effects as support for his molecular torrent theory of the nature of cathode rays. See Max Kohl A.G. (Chemnitz, Germany) catalog, No.100, vol. III (1927?) page 1014, #95823.
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