TY - JOUR T1 - On the Influence of Screens in Arresting the Progress of Magnetic Action and On the Power of Masses of Iron to Control the Attractive Force of a Magnet. JF - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843) VL - 3 SP - 69 EP - 71 PY - 1830/01/01/ UR - http://dx.doi.org/10.1098/rspl.1830.0042 M3 - doi:10.1098/rspl.1830.0042 AU - Harris, W. ER -