Letter from Charles Chree, The National Physical Laboratory (Kew Observatory Department), Richmond, Surrey, to [Robert William Frederick] Harrison 'Dear Mr Harrison, I return corrected proof and MS of abstract and form filled in [enclosures not present]. Also if a formal reply is wanted I would express my willingness to serve on the Physics and Chemistry Committee. I do so trusting that the demands on my time do not prove too exacting. Yours truly, C Chree'. 16 December 1904