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  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 171
SP  - 541
EP  - 560
PY  - 1880/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1880.0015
M3  - doi:10.1098/rstl.1880.0015
AU  - Ellis, W.
ER  -