Typescripts, mainly by D.H. Sadler, relating to discussions with G.M. Clemence regarding astronomical constants and other subjects. Comprises:

‘Meeting of International Astronomical Union, Zurich: Brief record and post agenda’, typescript by D.H. Sadler, 25 August 1948 (7 pp).

‘Rough draft’: typescript (2 pp).

‘List of proposed amendments to A3 and A2’: typescript by GMC and DHS, 9 November 1949 (4 pp).

‘Miscellaneous notes on DHS’s visit to Canada and U.S. October – November, 1949’: typescript by D.H.S., 14 November 1949 (6 pp).

‘Refraction’: typescript by D.H.S., 14 November 1949 (2 pp).

‘Twilight computers’: typescript by D.H.S., 16 November 1949 (3 pp).

‘Astronomical constants’: typescript by D.H.S., 16 November 1949 (1 page).

‘Reduction tables for celestial navigation’: typescript by D.H.S., 17 November 1949 (5 pp).

‘Applied mathematics laboratories’: typescript by D.H.S., 16 November 1949 (1 page).

‘Matters for discussion with Dr. G.M. Clemence, April 1950’: typed list (2 pp).

‘Notice to compilers and users of the American Ephemeris’ by G.M. Clemence, 4 March 1953 (1 page).

‘Revisions in the American Ephemeris for 1960’: by G.M. Clemence, March 1953 (2 pp).

‘Conference on the Fundamental Constants of Astronomy, Paris, March 27 – April 1, 1950 by A. Danjon, Director of the Paris Observatory (Translated by Simone Daro Grossner from Annuaire de Bureau de Longitudes, 1952)’: typescript (18 pp).