1955 March 11 meeting of the Royal Astronomical Society

1955 May 13 meeting of the Royal Astronomical Society

1955 November 11 meeting of the Royal Astronomical Society

1955 October 14 meeting of the Royal Astronomical Society

1955 September 8 meeting of the Royal Astronomical Society

1955 Summer meeting of the Royal Astronomical Society

1956 April 13 meeting of the Royal Astronomical Society

1956 December 14 meeting of the Royal Astronomical Society

1956 February 10 meeting of the Royal Astronomical Society

1956 January 13 meeting of the Royal Astronomical Society

1956 July 10 meeting of the Royal Astronomical Society

1956 March 9 meeting of the Royal Astronomical Society

1956 May 11 meeting of the Royal Astronomical Society

1956 November 9 meeting of the Royal Astronomical Society

1956 October 12 meeting of the Royal Astronomical Society

1957 April 12 meeting of the Royal Astronomical Society

1957 December 13 meeting of the Royal Astronomical Society

1957 February 8 meeting of the Royal Astronomical Society

1957 January 11 meeting of the Royal Astronomical Society

1957 March 8 meeting of the Royal Astronomical Society