TY  - JOUR
T1  - Observations on the Permanency of the Variation of the Compass at Jamaica. 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 1
SP  - 241
EP  - 242
PY  - 1800/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1800.0132
M3  - doi:10.1098/rspl.1800.0132
AU  - Robertson, J.
ER  -