Folders B.12.1-B.12.5 (1967-1970): 'Non-Valence Interactions'.

Series of lectures delivered at Polytechnic Institute of Brooklyn, New York, March-April 1968.

5 folders of notes, correspondence and research material for an uncompleted book based on the lectures.

Folder B.12.1: MS. drafts for lectures.

Folder B.12.2: correspondence, MS. notes and references assembled by Coulson for the proposed book.

Folder B.12.3: notes and material for Chapter 2 of book.

Folder B.12.4: notes and material for Chapters 3 and 4 of book.

Folder B.12.5: notes and material for Chapter 5 of book.

Folder B.12.6 (1957-1971):

'Variation method'.

Lecture given internationally (index of places and dates inside front cover).

Notes and correspondence.

Folder B.12.7 (1953): 'Present tendencies in the theory of large molecules'.

MS. notes and drafts for a lecture delivered in Rochester, New York.