Identity area
Reference code
Add. MS a/200/168
Title
Letter from George Airy
Date(s)
- 15 Mar. 1861 (Creation)
Level of description
Item
Extent and medium
2 pp.
Context area
Name of creator
Repository
Archival history
Immediate source of acquisition or transfer
Content and structure area
Scope and content
GA has fallen behind in his official observatory work: 'I have to work well in order to bring it to a respectable state'. He has been going through the Horizontal Magnetic Forces from ten years photographic self-registration, and has found that 'twice in every lunar day, the needles N.pole is drawn vertically, and twice returns easterly. But the vertically is not true W. but, as far as our numbers can be trusted, about 20 [degrees] N. of W. It may be, among these small quantities that there is sufficient uncertainty to allow us to take the direction as truly W.'