Analysis of information sources in references of the Wikipedia article "Induction coil" in English language version.
The electrolytic interrupter consists of a vessel containing a solution of dilute sulphuric acid with two terminals immersed in this solution. The positive terminal or anode is made of platinum and should have a surface of about 3/16 in.[sic] The negative terminal or cathode is made of lead and should have an area of something like 1 sq. ft. When this interrupter is connected in series with the primary of an induction coil and a source of electromotive force of about 40 volts, the circuit will be interrupted, due to the formation and collapse of bubbles on the platinum electrode.Page 31 describes electrolytic interrupter, but does not identify as Wehnelt interrupter.