Correspondence and papers relating to the Joint Organization for Solar Observations, including reports of Board meetings and on various other subjects, and several drafts of a Science Research Council paper on 'Possible Basis for Negotiation of an International Convention on Co-operation in Astrophysics Research in the Canary Islands'.

Originally enclosing the observations by Thomas Hedgcock at [RGO 14/35: 306-309].

A copy of a memorandum prepared by Bennet McInnes for the Northern Hemisphere Observatory Planning Committee entitled 'Comparison of Observing Conditions in Madeira and in the Canary Islands', 8 May 1974.

The observations were taken between 28 January and 14 February 1819 from the merchant brig Nancy of London, which was on a voyage to the Canary Islands, with Benjamin Stacey as master. The note was made by the ship's charterer.

From a voyage of the Brig Nancy, under Master Benjamin Stacey, sailing from Ramsgate to the Canary Islands between 1 December 1818 and 28 January 1819.

The agenda and papers for the fourth meeting of the Northern Hemisphere Observatory Planning Committee on 21 December 1972; the minutes of the previous meeting of 19 October; and a 'Report on Visit to the Canary Islands' by Merle F. Walker.

A copy of a report by Bennet McInnes, Royal Observatory, Edinburgh, and Merle F. Walker, Lick Observatory, on 'Astronomical Site Testing in the Canary Islands', 14 March 1974.

A copy of the report by K.O. Kiepenheuer and W. Schellenberger, Fraunhofer Institut, Freiburg, L. Staveland, Institute for Theoretical Astrophysics, Oslo, entitled 'The Autumn 1971 Site Testing Campaign at Canary Islands (Oct. 7 - Nov. 3, 1971)'. The reports recommends that further studies be made at Tamburiente, La Palma, and at Pico Viejo, Tenerife.