Copy letter from Robert William Frederick Harrison, to Professor Arthur Schuster, Fellow of the Royal Society, Chairman of the Physics and Chemistry Committee Sir William [de Wiveleslie] Abney reports against the publication by Professor A Gray and others on 'The relative visibility of the different colours of the spectrum'. Sir Joseph Larmor has written to Gray suggesting withdrawal. Sending a copy of last week's Physics Committee Minutes for his perusal. Professor Hicks declines to report on Bousfield's paper, so it has been sent to Mr Porter. 29 October 1912