TY  - JOUR
T1  - Observations of the Diurnal Variation of the Magnetic Needle, in the Island of St. Helena; With a Continuation of the Observations at Fort Marlborough, in the Island of Sumatra. By John Macdonald, Esq. In a Letter to the Right Hon. Sir Joseph Banks, Bart. K. B. P. R. S.
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 88
SP  - 397
EP  - 402
PY  - 1798/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1798.0019
M3  - doi:10.1098/rstl.1798.0019
AU  - Macdonald, J.
ER  -