TY  - JOUR
T1  - Contributions to Terrestrial Magnetism. No. IX
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 139
SP  - 173
EP  - 234
PY  - 1849/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1849.0012
M3  - doi:10.1098/rstl.1849.0012
AU  - Sabine, E.
ER  -