File of papers found loose and unlabelled, comprising notes and calculations, some relating to thermal expansion [?]. 1 page is headed 'Spacings from graph in Owen and Yates's paper'. No dates found but possibly late 1930s? [the Owen and Yates article referred to is probably an article of 1937 in Proceedings of the Physical Society on 'X-Ray Investigation of pure iron-nickel alloys. Part 2: thermal expansion of some further alloys'].