| Description | 'Rock magnetism, Mexico City 31/8/55'. Headings, diagrams, brief notes for talk, 3pp
(included with above) 'Kapitza Institute, June 4, 1958 RM and CD' (Rock Magnetism and Continental Drift). Headings and notes, using similar material, 3pp
'Cambridge. Geophys. Colloquium, May 7 1956'. Headings, diagrams and notes, some on continental drift, but mainly on field reversal, 4pp |