Cavendish Laboratory, Cambridge Photocopy of letter, 18 March 1924, from Cambridge colleagues to Blackett who was on his honeymoon. 'From the Club greetings - we feel that we have lost an electron from our innermost ring... Written and signed by the 'Adiabatic Invariants': D.R. Hartree, K.G. Emeleus, J.E. Jones, E.C. Stoner, H.W.B. Skinner, P. Kapitza, and unidentified. Also, Letter of appointment as Demonstrator in Physics, Cambridge, 30 November 1927. Letter from A.W. Smith, Physics Department, Ohio State University, offering one-year sabbatical appointment to Blackett. MS. draft of Blackett's reply of Blackett's reply asking if he could come for a shorter period. 1924-1930