1915 March 12 meeting of the Royal Astronomical Society

1915 March 17 meeting of the Royal Meteorological Society

1915 May 14 meeting of the Royal Astronomical Society

1915 May 19 meeting of the Royal Meteorological Society

1915 May 26 meeting of the British Astronomical Association

1915 November 12 meeting of the Royal Astronomical Society

1915 November 17 meeting of the Royal Meteorological Society

1915 November 24 meeting of the British Astronomical Association

1915 October 27 meeting of the British Astronomical Association

1915 Quetzalcoatl Observation

1915 Quetzalcoatl Observation

1915quetzalcoatl

1916 April 14 meeting of the Royal Astronomical Society

1916 April 19 meeting of the Royal Meteorological Society

1916 December 20 meeting of the Royal Meteorological Society

1916 December 8 meeting of the Royal Astronomical Society

1916 February 11 meeting of the Royal Astronomical Society

1916 February 16 meeting of the Royal Meteorological Society

1916 February 23 meeting of the British Astronomical Association

1916 January 14 meeting of the Royal Astronomical Society