TY - JOUR T1 - Discussion of the Observed Deviations of the Compass in Several Ships, Wood-Built and Iron-Built: With a General Table for Facilitating the Examination of Compass-Deviations JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 146 SP - 53 EP - 99 PY - 1856/01/01/ UR - http://dx.doi.org/10.1098/rstl.1856.0007 M3 - doi:10.1098/rstl.1856.0007 AU - Airy, G. ER -