The existence of a mode of periodic movement of a volumetric charge of negative sign from an electrode with a negative potential (600–4500 V) in the direction of the other earthed electrode was discovered. The experiments were carried out with the discharge of a constant current in the presence of the pressure of air (10−3–10 Torr) in tubes with various internal diameters (3.8, 6.6, 15.5, 20.1, and 25.8 mm) but with the same (510 mm) distance between the electrodes. The opportunity for the appearance of the mode of periodic discharge was provided by the connection to the potential output of a source of several condensers of large capacity (300 μF). It is supposed that the discovered periodic mode of the gas discharge is similar to the Gann effect—the movement of a volumetric charge of negative sign in the volume of a semiconductor.