TY  - JOUR
T1  - On the Relation between the Diurnal Range of Magnetic Declination and Horizontal Force, as Observed at the Royal Observatory, Greenwich, during the Years 1841 to 1877, and the Period of Solar Spot Frequency. 
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 29
SP  - 43
EP  - 45
PY  - 1879/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1879.0009
M3  - doi:10.1098/rspl.1879.0009
AU  - Ellis, W.
ER  -