1903 The Lancet  
of Cardiff an account of an apparatus which he has designed for the production of high-frequency currents. Our correspondent claims that his apparatus presents certain points which are new-namely, that he can vary the frequency or rate of oscillation within the wide range of from 3000 a minute to 80,000 a second ; secondly, he describes his apparatus as providing currents of high frequency and low potential (from A diagram of the complete apparatus. 40 to 100 volts) in distinction from the more
more » ... ction from the more usual currents of
doi:10.1016/s0140-6736(01)70946-4 fatcat:xwrghqdq6vehtfbbrjqsuezczm