Physics: electricity. Folder A.72. Notes and notes on the literature, mainly university (to 1939) but includes a little school material, indexes on a0, a115, paginated a0-a158, several pages sub-divided. Folder A.73. Part I lecture course "Electricity" by J.A. Ratcliffe, Michaelmas 1937, Easter 1938, index on front pages, paginated 0a-204a. Folder A.74. Practical electricity, laboratory notes and experiments at Clifton, 1935-1936, some initialled W.C.B.…