Sadler, Donald Harry, 1908 - 1987 (astronomer)
Found in 85 Collections and/or Records:
A reprint of Porter and D.H. Sadler's 'The Accurate Calculation of the Apparent Places of Stars', 'Monthly Notices of the Royal Astronomical Society', Vol. 113, No. 4, pp. 455-467.
'Comet Pons-Winnecke. Methods of combining 1927 and 1933 apparitions', a draft paper by D.H. Sadler, dated 30 March 1938, with annotations by Porter.
'Preliminary comments on J.G.P.'s notes on "The Perturbation-of-Elements Method"', produced by Porter in connection with his work at the N.A.O. and sent to D.H. Sadler.
Personal correspondence of D.H. Sadler of the Nautical Almanac Office.
A letter from W.A.H. Watson, Air Ministry, to D.H. Sadler, Nautical Almanac Office, 9 March 1944, and Sadler's reply of 15 March, regarding 'The ABC of Practical Astro-Navigation' by R.K. Vandervord and whether it may have infringed Crown Copyright.
A small set of correspondence with D.H. Sadler, N.A.O., regarding slowly convergent series.
A letter from D.H. Sadler, Nautical Almanac Office, to H. Spencer Jones, 5 June 1946, regarding Ryde night illumination diagrams, with Spencer Jones' reply of 11 June 1946.
Correspondence between the Royal Observatory, Greenwich; the Nautical Almanac Office; and the Department of Physical Research concerning a proposal for a later report on the course on numerical computation with D.H. Sadler as lecturer.
Three pieces of correspondence between D.H. Sadler, N.A.O., and Professor Dirk Brouwer regarding automatic measurement of star positions.
Three items of correspondence between Dr G.M. Clemence of the United States Naval Observatory and D.H. Sadler of the Nautical Almanac Office regarding the Destination Almanac.
A letter from H. Spencer Jones to D.H. Sadler, 25 February 1949, and Sadler's reply of 26 February, regarding the meeting of the International Astronomical Union in Copenhagen in 1946.