Copy letter from Herbert Rix, to Professor William Edward Ayrton, Fellow of the Royal Society 'Dear Sir, "Quadrant Electrometers" by Messrs Ayrton, Perry & Sumpner. The Secretaries authorise the publication of the above paper in the Phil. Trans. ['Philosophical Transactions of the Royal Society'], but, at the same time, they instruct me to send you the accompanying extract from the report of one of the referees. Before I put the paper in hand I shall be glad to know whether you have any modifications to make in the ms. [manuscript] in consequence of the above report. Yours truly Herbert Rix Asst. Sec. RS [Assistant Secretary, Royal Society]'. 13 July 1891