TY  - JOUR
T1  - On Improvements in the Instruments and Methods Employed in Determining the Direction and Intensity of Terrestrial Magnetism. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 3
SP  - 184
EP  - 186
PY  - 1830/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1830.0105
M3  - doi:10.1098/rspl.1830.0105
AU  - Christie, S.
ER  -