Calendar: 1969-1970 Page 447

Annual Report oj the Delegacy lxxxv Higher Degrees Ph Jill Bonner 'Numerical studies on the linear Ising- Heisenberg Model Ph Bralsford 'Photoionization and spectroscopic studies of some unsaturated molecules Ph Calderbank 'Elastic and inelastic scattering of 50 MeV protons by Zn 64 66 68 70 using wedge shaped scintillation detector with magnetic spectrometer Ph Cantor 'Some observations on the polarisation spec- trum of very low frequency radio waves Ph Collins 'Optical and electrical properties of natural and synthetic semi-conducting diamond Ph Cundill 'Infra-red studies on solids under pressure Ph Denham 'Photoconductivity and electric field modulation of absorption and luminescence near the fundamental absorption edge in diamond Ph Κ Feltham 'The effect of sunrise and sunset on and radio noise Ph Hunger Configurational studies of the Ising model Ph Lewis 'Polarisation in the scattering of 50 MeV protons Ph McKcnzie Ά study of the statistical mechanics of athermal polymer solutions Ph Quinton 'Some aspects of the laser in spectroscopy Ph Τ Searle Optical studies of interactions between point defects in magnesium oxide Departmental Notes The high level of activity in the department is reflected in the number of first-class degrees awarded in the number of Ph theses presented and by the large volume of published papers This is particularly satisfying in view of the difficulties occasioned by College rebuilding Research within the department depends heavily on outside support without which it is clear it could not continue on the present scale