Scope and Contents

Reports by J.S. Hey and others. The material is on meteors and it includes O.R.G. Report 348 [Army Operational Research Group] describing observations October 1944-April 1946.

Scope and Contents

‘The Influence of the Earth's magnetic field on Wireless Transmission'. The material consists of manuscript draft notes for a paper by Edward Appleton with a partial typed version attached, no date, c. 1925-1943.

Scope and Contents

'The influence of the earth's magnetic field on wireless transmission'. The material consists of a draft of a paper presented by Edward Appleton at the U.R.S.I. [Union Radio-Scientifique International] General Assembly, Washington, 1927. It includes a typescript and published versions and the typescript draft has a manuscript note by Appleton, who lent it to A.J. Lyon for work at Edinburgh, 1955.

Scope and Contents

The material consists of draft notes for 3 papers by Edward Appleton: 'The magneto-ionic Theory', 6 pages, developing Lorentz's Theory; 'Notes on application of Lorentz’, 1 page; and ‘Results Lorentz notation’, 1 page, no date, c. 1925-1943.

Scope and Contents

‘The propagation of wireless waves through an ionized gas in a magnetic fieId’. The material consists of section 2 of a paper by Edward Appleton, paginated 4-9, no date, c. 1925-1943.

Scope and Contents 'Wellenausbreitung in ionisierten Gasen unter dem Einfluss eines Magnetfelds'. The material consists of a manuscript narrative and calculations by Wilhelm Altar, variously paginated. Professor C.S. Gillmor described this document as 'very important for the history of the ionosphere' and gave its date as 'late 1925 - early 1926' in a private communication on 4 December 1978. The document was registered for copyright by Dr Altar, 1978. There are brief notes by Appleton on the title sheet and 2...

Scope and Contents

The material consists of report, 'W.G. Baker: Anomalous magnetic variations near the Equator', no date.