This work was undertaken as a Research Contract with the Admiralty Department of Research Programmes and Planning for the study of electronic structure of compound semi-conductors of the zinc blend type.

Copies of the progress reports on the project, nos. 1-7, are included with the folders.

Folder B.14.1: MS. notes by Coulson, including MS. draft for paper on 'Tetrahedral metallic compounds', written on verso of MS. draft of his Tawney Memorial Lecture on 'Responsibility'.

Folder B.14.2: MS. drafts by Coulson's collaborators, G. Doggett, D. Stocker and L.B. Rèdei for published reports on the project.

Folders B.14.3-B.14.4: Correspondence with Admiralty, Oxford University and collaborators regarding establishment of contract, proposals for research, administration of grant, equipment, publication of results, etc.Folder B.14.3: 1957-1960. Folder B.14.4: 1960-1966.