Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Geoffrey Ingram] Taylor, FRS Updates Prof. [Geoffrey Ingram] Taylor on the voltage current available during the 17 May Soiree. States only 106 volts can be achieved in an alternating current. Informs that 200 volts can be achieved with a direct current. Asks if Taylor can find another vacuum cleaner. 2 May 1928