TY  - JOUR
T1  - Contributions to Terrestrial Magnetism.--No. XV. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 25
SP  - 148
EP  - 148
PY  - 1876/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1876.0032
M3  - doi:10.1098/rspl.1876.0032
AU  - Sabine, E.
ER  -