TY  - JOUR
T1  - Theory of the Diurnal Variation of the Magnetic Needle, Illustrated by Experiments. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 2
SP  - 321
EP  - 323
PY  - 1815/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1815.0327
M3  - doi:10.1098/rspl.1815.0327
AU  - Christie, S.
ER  -