TY  - JOUR
T1  - On the Present Situation of the Magnetic Lines of Equal Variation, and Their Changes on the Terrestrial Surface
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 123
SP  - 667
EP  - 673
PY  - 1833/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1833.0029
M3  - doi:10.1098/rstl.1833.0029
AU  - Barlow, P.
ER  -