Hardback notebook, inscribed 'Edward V. Appleton, Captain R. E.', c. 1914-Jul 1929

Hardback notebook, inscribed 'Edward V. Appleton, Captain R. E.' Presumably Appleton acquired this notebook during his service in World War I. The notebook contains detailed observations and comparison of various stations, almost all in Appleton's hand or with comments by him. The inside front cover has a detailed list of experiments numbered 1-77, dated March 1926 to November 1928, which form the contents of the notebook. It also includes some narratives and summaries of the experiments by Appleton. The work continues to July 1929, on Modulation Frequency Tests.