Copy letter from Herbert Rix, to William Henry Preece, Fellow of the Royal Society Asks if Preece will arrange the electrical requirements for Professor [William Chandler] Roberts-Austen's [Soirée] exhibit on 1 May. Two other exhibits requiring an alternating current have been accepted by Lord Rayleigh [John William Strutt]; apparatus describing alternating currents shown by Professor W M Hicks, and by Professor Fleming. The former would like 10 amperes but is prepared to do with less. Professor Fleming wants one ampere only. Both shall have to be given continuous current from the Society's own mains as well. 22 April 1895