TY - JOUR T1 - Experiments to Ascertain the Ratio of the Magnetic Forces Acting on a Needle Suspended Horizontally, in Paris and in London. JF - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843) VL - 2 SP - 326 EP - 327 PY - 1815/01/01/ UR - http://dx.doi.org/10.1098/rspl.1815.0330 M3 - doi:10.1098/rspl.1815.0330 AU - Sabine, E. ER -