Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor Arthur Schuster, Secretary of the Royal Society '(1) Prof Bragg's Bakerian Lecture; (2) Paper by J H Brinkworth; (3) Paper by Mr Strutt on "Observations on the resonance radiation of sodium vapour". Prof Less has seen the above paper and suggests that: (1) Should be referred to Dr Tutton and Prof Pope. (2) Should be referred to Dr Harker and Prof Hopkinson, or failing the latter, Sir Alfred Ewing: (3) Should go forward if Prof Schuster concurs. Will Prof Schuster please say if he approves of these suggestions.' 15 April 1915