TY  - JOUR
T1  - On the Present Amount of Westerly Magnetic Declination [Variation of the Compass] on the Coasts of Great Britain, and Its Annual Changes. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 20
SP  - 434
EP  - 435
PY  - 1871/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1871.0081
M3  - doi:10.1098/rspl.1871.0081
AU  - Evans, F.
ER  -