Scope and Contents

Comprises correspondence between David Thomas at Royal Observatory, Cape of Good Hope, South Africa, and A. M. Allen ("Melville") at Royal Greenwich Observatory, Herstmonceux. Includes correspondence on electronics equipment and the operation of the astrolabe.

Scope and Contents

Comprises correspondence between David Thomas at Royal Observatory, Cape of Good Hope, South Africa, and R. H. Tucker ("Tommy") at the Meridian Department of Royal Greenwich Observatory, Herstmonceux. Includes correspondence on astrolabe data and analysis. Enclosures mentioned in the letters appear to have been removed before deposit.

Scope and Contents

Comprises correspondence between David V. Thomas at Royal Observatory, Cape of Good Hope, South Africa, and S. Yumi at International Polar Motion Service, International Latitude Observatory, Japan. Includes correspondence on astrolabe results and data.

Scope and Contents

Comprises correspondence between David V. Thomas and G. Billaud at Centre d'Etudes et de Recherches Geodynamiques et Astronomiques, Grasse, France. Includes correspondence on astrolabe results and an astrolabe working group of Commission 8 of the International Astronomical Union. Enclosures mentioned in the letters appear to have been removed before deposit.

Scope and Contents Comprises correspondence between David V. Thomas and fhe following correspondents: Bazlur Rahman at Survey of Pakistan; Harold W. P. Richards at Royal Greenwich Observatory; John A. Decker Jr. at Comstock & Westcott, Inc, Cambridge, Massachusetts; The Director, Trigonometrical Survey, Mowbray, South Africa; S. K. Sharma at Survey of India; H. Enslin at Deutsches Hydrographisches Institut, Hamburg, Germany; D. H. Sadler at H. M. Nautical Almanac Office,...

Scope and Contents

Paper by R.E. Wallis titled 'The Danjon Prismatic Astrolabe'. Photocopied handwritten draft with handwritten title page.