Calendar: 1963-1964 Page 438

annual report xli Professor Bondi paid brief visit to Australia and lectured in Canberra on Gravitational waves and on Relativity in Sydney he gave course of lectures on Relativity and on The structure of the universe 11 at the Summer Science School of the Nuclear Research Foundation He gave course of lectures on Gravitational waves י' at the Technische Hochschule in Zurich He gave the 1962 Halley Lecture in Oxford on Physics and Cosmology the Kelvin Lecture in Glasgow on Relativity the Perring Memorial Lecture at the Royal Aircraft Establishment on Relativity and one of the three 1961 Guildhall Lectures Why scientists talk This lecture was also given on television Other lectures were given at Queen Elizabeth College Queen Mary College Bedford College and Imperial College the Borough and Chiswick Polytechnics the Meteorological Office Bracknell Oxford University Astronomical and Scientific Societies the Institute of Physics Glasgow the Leicester Mathematical Association the Associa- tion of Women Science Teachers the Conference of the Nottingham Mathematical Association Balls Park Training College Hertford Ton- bridge School Woodhouse Grammar School and to the Engineering and Chemistry staff at the Royal Arsenal Woolwich He organized one-day discussion at the Royal Society on The present state of Relativity Dr Frohlich spent January to June as Visiting Research Fellow at the California Institute of Technology where he gave postgraduate course on Hilbert theory and cyclotomic fields He delivered special lecture on The inverse problem of Galois theory and seminar lecture on Discriminants "-the latter at the University of California Dr Scott gave lecture to the Mathematical Society of the University of Wales Aberystwyth Dr Kilmister gave lecture on Recent developments in University Mathematics at the Kent Education Committee's con- ference at Broadstairs He lectured on The problem of preferred inertial frames at the University of Hull and on Mach's principle in Newtonian mechanics at the University of Durham Dr Pirani gave four College Public Lectures in War Studies on Ballistic missiles in series given jointly with Dr Elliott of the Physics Department He gave two lectures at the Institut Henri Poincare of the Sorbonne on Quelque developpements recents dans la theorie de la radiation gravitationelle and Les corps rigides en relativite He lectured at Liverpool University on Rigid bodies in general relativity at the University College of North Wales on General ideas of gravitational radiation theory and in the Uni- versity of London Seminar on Security and Disarmament on Possible developments in weapon systems Dr Saffman addressed the International Conference on the Mechanics of Turbulence at Marseilles on The effects of molecular diffusion on turbulent diffusion He read paper on The flow of