TY  - JOUR
T1  - A Theory of the Variation of the Magnetical COMPASS, by Mr. Ed. Halley Fellow of the R. S.
JF  - Philosophical Transactions (1683-1775)
VL  - 13
SP  - 208
EP  - 221
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1683.0031
M3  - doi:10.1098/rstl.1683.0031
AU  - Halley, E.
ER  -