Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor Arthur William Crossley, Secretary of the Chemical Sub-Committee and FRS Informs Professor Arthur William Crossley that the President is appointing a small Committee to advise in cases which arise under the recent regulation of the Board of Trade exempting analytical chemists from enlistment except by consent of the Royal Society. Asks if Professor Crossley will consent to serve on that Committee. 7 January 1916