Boxes 1-12: class experiments, nos. 1-708. The experiments are written up in essay form, each with a title, date and number.
Boxes 13-14: class experiments, 1892-1907 and 1923-1944, with cyclostyled notes of practical physics, 1891-1892, and other miscellaneous information.
Box 15: Searle's experimental optics, class experiments, nos. 40-70.
Box 16: class experiments, lens systems 19-25.
Box 17: class experiments: Searle's experimental optics nos. 6-38.
Boxes 18-20: filed class experiments: mechanics, heat, electricity and magnetism, optics, and sound.
Box 21: Adams prize Essay 1908, 'The motion of electric systems and the radiation from them' (typescript), with miscellaneous other papers.
Box 22: notebooks on J.J. Thomson's lectures.
Box 23: labotatory experiments, 1897; electricity, 1901; tonal harmonics, 1907-1932.
Boxes 24-27: experimental notebooks for Part I.
Box 28: notebook on lectures, 1901-1934.
Box 29: notebooks: electricity (1902); lists of class experiments; exam questions in practical physics, 1882-1891.