TY  - JOUR
T1  - Geometrical Investigations concerning the Phenomena of Terrestrial Magnetism. Second Series: On the Number of Points at Which a Magnetic Needle Can Take a Position Vertical to the Earth's Surface
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 126
SP  - 75
EP  - 106
PY  - 1836/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1836.0011
M3  - doi:10.1098/rstl.1836.0011
AU  - Davies, T.
ER  -