Copy letter from unknown correspondent; to Messrs Harrison & Sons, 46 St. Martin's Lane 'Please prepare and send with account to Mr. W.R. Cooper, Fernside, 113 Tulse Hill, S.W. electros of the figures appearing in Mr. F.E. Smith's paper on "The Normal Weston Cadmium Cell" ([Philosophical Transactions], Vol. 207, page 393)' 15 May 1916