TY - JOUR T1 - On the Means Adopted in the British Colonial Magnetic Observatories for Determining the Absolute Values, Secular Change, and Annual Variation of the Magnetic Force. JF - Abstracts of the Papers Communicated to the Royal Society of London (1843-1854) VL - 5 SP - 942 EP - 944 PY - 1843/01/01/ UR - http://dx.doi.org/10.1098/rspl.1843.0236 M3 - doi:10.1098/rspl.1843.0236 AU - Sabine, E. ER -