Copy letter from Robert William Frederick Harrison to Newman Howard, Preswylfa, Aberdovey, North Wales 'Dear Sir, I have to acknowledge your letter of yesterday enclosing note on "Elemental Weight" and I am to say that it is an invariable rule of the Society that no Paper can be received for consideration unless it be communicated by a Fellow of the Society. I therefore return your paper for this condition to be fulfilled.' [no enclosure] 13 July 1910