TY  - JOUR
T1  - A Table of the Mean Declination of the Magnet in Each Decade from January 1858 to December 1863, Derived from the Observations Made at the Magnetic Observatory at Lisbon; Showing the Annual Variation, or Semiannual Inequality to Which That Element Is Subject
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 13
SP  - 347
EP  - 349
PY  - 1863/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1863.0078
M3  - doi:10.1098/rspl.1863.0078
AU  - Silveira, S.
ER  -