TY  - JOUR
T1  - Observations of the Diurnal Variation of the Magnetic Needle at Fort Marlborough, in the Island of Sumatra. By John Macdonald, Esq. In a Letter to John Crisp, Esq. F. R. S.
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 86
SP  - 340
EP  - 349
PY  - 1796/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1796.0015
M3  - doi:10.1098/rstl.1796.0015
AU  - Macdonald, J.
ER  -