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  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 176
SP  - 679
EP  - 689
PY  - 1885/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1885.0013
M3  - doi:10.1098/rstl.1885.0013
AU  - Airy, G.
ER  -