Folder B.27.1: 'A short historical survey of the discovery and manipulation of the knowledge gained from soap-bubbles and their allied forms of plane-films and capillarity', 1929. An essay submitted for the Grenfell Essay Prize, Cambridge. 36 pp. manuscript.

Folder B.27.2: 'Gyroscopes', 1930. An essay submitted for the Yeats Mathematics Prize, Trinity College, Cambridge. 88 pp. ms. and 3 pp. references.

Folder B.27.3: Work on curve tracing, c.1929. Extensive notes, class exercises, diagrams.

Folder B.27.4: 'Problems in molecular structure', 1933.

92 pp. MS., bound up by Coulson and dated 27.2.33, with a 2 pp. statement of problems to be solved, in the hand of J.E. Lennard-Jones.

Folder B.27.5: Folder of material for a proposed book for 6th-formers, on the relations between science and religion, in the 'Gateway' series, 1952-1966. The project was not completed.

The material includes correspondence, notes, press-cuttings, questions for discussion and Coulson's answers (at various conferences, discussion groups, etc.) and typescripts of various talks and broadcasts given by Coulson.

Folder B.27.6-B.27.7: 'Wave mechanical theory of conjugated systems' (later 'molecules'), 1951-1955. A proposed book, to be written in collaboration with H.C. Longuet-Higgins.

Folder B.27.6: MS. drafts, working papers and correspondence.

Folder B.27.7: Plan of the book (9 chapters), MS. of extended version (13 chapters), and a letter regarding publication, 1974.