|Title||Letter from G B Airy, Royal Observatory Greenwich, to WR Birt|
|Date||21 December 1865|
|Description||On the meridian illumination of a spot on the moon.|
During the 1860s, Birt was secretary of the British Association's Lunar Committee for Mapping the Surface of the Moon.
Fellows associated with this archive
|NA8035||Airy; Sir; George Biddell (1801 - 1892); astronomer and mathematician||1801 - 1892|