The stations are fitted out with a 28 H.P. benzine-motor driving a dynamo and supplying the neces sary current for charging an ae cumulater-battery from which the current is then taken for driving the transmitting machinery, A "Converter" run by this battery will supply an alternating current of £00 cycles per second, which is stepped up to some 10-12000 volts and used for charging the large condensers producing the electric oscillations and waves. The frequency of the oscillations being changed according to the wavelength can be varied between 100,- 000 and 500.000 per second and thus produces waves with lengths between 3,000 and 600 metres. The sparking in the spark-discharger takes place with a frequency of 1,°00 per second, whereby is obtsined that the signals are received by other stations as a fine musical tone that will cut through the called "statics" or electric dis-
Text read from the printed page and cleaned; old type leaves the occasional error.