TY  - JOUR
T1  - A Contribution to Terrestrial Magnetism. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 25
SP  - 168
EP  - 169
PY  - 1876/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1876.0038
M3  - doi:10.1098/rspl.1876.0038
AU  - Shadwell, C.
ER  -