TY  - JOUR
T1  - Results Deduced from the Measures of Terrestrial Magnetic Force in the Horizontal Plane, at the Royal Observatory, Greenwich, from 1841 to 1876. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 39
SP  - 255
EP  - 258
PY  - 1885/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1885.0020
M3  - doi:10.1098/rspl.1885.0020
AU  - Airy, G.
ER  -