Copy letter from an unknown correspondent, to Messrs Harrison & Sons Asks the Messrs to supply the Editor of 'Nature' with an electro from the paper by Beeton, G U Yule & [Karl] Pearson. The paper has not yet got into the 'Proceedings [of the Royal Society]' but the Messrs can identify the figures from the enclosed cutting and a slip proof used at the meeting [no enclosures]. 10 August 1900