Calendar: 1968-1969 Page 414

lxxii Annual Report of the Delegacy Wallingford Wye College the Mathematical Society of Queen Mary College the Glasgow Humanist Society Brunei College Physics Society Westfield College Imperial College Wells Society the Bristol Branch of the Mathematical Association Imperial College Huxley Society the Imperials Defence College and the University of York Professor Frohlich spoke at Nottingham University on 'Galois homomorphisms' at Durham University on 'Quadratic forms over special fields' at the University of London Algebra Seminar on 'Galois theory and group representation' He gave short course of lectures at the Mathematical Institute of the Freie Universitat Berlin on 'Formal groups' He also gave postgraduate course on the same subject in the University of London Dr Allan gave lecture on 'Planetary magnetohydrodynamic waves' at the NATO Institute Newcastle in April and delivered series of talks at the Rand Corporation during the summer vacation Dr Burgoyne visited South African universities and research institutes in March and April to lecture and to report on digital com- puting activities Dr Higgins who had been appointed Visiting Professor at the University of Michigan for the session 1966-67 delivered colloquium lectures on 'Groupoids' at Cornell University and the University of Chicago Dr Laird lectured at Imperial College on Nonline ar effects in emissions' Dr -T Lue spoke to the algebra seminar of the University of Sussex on 'Non-abelian cohomology' Dr Pirani gave two lectures on 'Gravitational radiation' at the Dublin Institute of Advanced Studies Mr Reeve addressed the British Association for the Advance- ment of Science on 'Topology' the General Conference of the Uni- versity of Sussex on Some connexions between Lie groups rotation groups singularities of algebraic varieties and exotic spheres' the Reading University Mathematical Society on 'What is topology Oundle School VI Form on 'Knots and surfaces' the University College of North Wales Mathematics Seminar on 'Singularities' the University College of North Wales Mathematical Society oa 'Topo- logy' Queen Elizabeth College Mathematical Society on What is topology the Liverpool Mathematical Society on 'Topology knots and surfaces' the Liverpool Mathematical Society on 'What is