TY  - JOUR
T1  - Observations on the Reciprocal Influence which Magnetic Needles Exercise over Each other, When Placed at a Given Distance within their Respective Spheres of Action, at Different Positions on the Earth; with Tables of Numerical Results Obtained at Separate Stations. Also a Method of Discovering Where Certain Local Influences are Acting on the Needle, from which may Be Obtained a Proportional Correction to Be Applied to Magnetic Observations in General.
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 3
SP  - 282
EP  - 282
PY  - 1830/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1830.0158
M3  - doi:10.1098/rspl.1830.0158
AU  - Johnson, E.
ER  -