Introduction, M.C.R.Symons. Part 1 Aspects of applied inorganic photochemistry - the photographic process, R.S.Eachus and M.T.Olm: a photographic system - description and definitions; physical properties of the silver halides; the latent image; role of impurities in photography; summary. Part 2 Radiation chemistry, J. Butler et al: fundamental processes; gases; aqueous solutions; biological macromolecules; organic systems (solid and liquid); polymers and polymerization; further aspects of applied radiation chemistry. Part 3 Quantum calculations on reactive collisions, D.E.Manolopoulos and D.C.Clary: natural collision coordinates; hyperspherical coordinates; Jacobi coordinates; conclusions. Part 4 Physical-chemical aspects of mass spectrometry, C.A.F.Johnson and J.E.Parker: introduction; instrumentation; anions; high resolution spectroscopy of ions; solids; dynamics of ion/molecule reactions; dications; structure elucidation studies using framentation reactions; collision activated reactions; photon effects; ionic clusters; conclusions.