Measurements using a rotating multiplehyphen;disk electrostatic generator of the classical Holz type show that a machine of this kind is entirely practical for producing currents up to 10 milliamperes at voltages as high as 200 kilovolts. For higher voltages a number of such units may be used in cascade, mounted on successive insulated platforms and making provision against corona and sparkhyphen;over as in standard high voltage practice.
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