Calendar: 1974-1975 Page 465

lxxxiv Annual Report of the Delegacy lectured on Operators with Abelian commutants' to the Mathematics Colloquium University of Newcastle-upon-Tyne Dr Hodgkin spent the academic year as Maitre de Conferences Universite d'Alger Algiers He gave course in Elliptic Operators at Algiers jointly with Grisvard Universite de Nice Dr Nunn gave lecture at the Northern Universities Geophysical Meeting at York University on Ά self consistent theory of Triggered VLF emissions' He also lectured at Sheffield University and Imperial College on the same subject He gave presentation to on Low Frequency Aeriels Dr Robinson gave lecture on 'Uniqueness Theorems and Black Holes' at Syracuse University and at the Institut Henri Poincare Paris He gave lecture on Black Holes at the International Centre for Theoretical Physics Trieste Dr Tyrrell gave lecture on 'Some problems concerning polynomials' at the University of Kent on 'Inversion' at Winchester College on Ά theorem of Clebsch' to the London-Sussex Geometry Seminar Dr Harvey and Dr Davies took up their appoint- ments in the Department at the beginning of the year Among visitors to the Department the following deserve special mention Professor Reiner University of Illinois as an Senior Visiting Fellow Professor Ullom University of Illinois as an Senior Visiting Fellow Professor Martinet Universite de Bordeaux as an Senior Visiting Fellow Professor Clay University of Arizona Tucson Professor Bass Columbia University Professor -P Serre College de France Paris DEPARTMENT OF PHYSICS Number of Students Sc Broad-Based 87 Sc Ancillary Subject 34 Sc Major subject 62 Postgraduate 21 Departmental Notes Professor Price gave plenary lectures at the Advanced Study Institute Montreal the Chemical Society University of East Anglia Faraday Society University of Sussex the Photoelectron Spectroscopy Conference at Liege and the International Synchrotron Radiation