1915 December 29 meeting of the British Astronomical Association

1915 February 12 meeting of the Royal Astronomical Society

1915 February 17 meeting of the Royal Meteorological Society

1915 February 24 meeting of the British Astronomical Association

1915 January 20 meeting of the Royal Meteorological Society

1915 January 27 meeting of the British Astronomical Association

1915 January 8 meeting of the Royal Astronomical Society

1915 June 11 meeting of the Royal Astronomical Society

1915 June 16 meeting of the Royal Meteorological Society

1915 June 30 meeting of the British Astronomical Association

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