TY - JOUR T1 - Amended Rule for Working out Sumner's Method of Finding a Ship's Place JF - Proceedings of the Royal Society of London (1854-1905) VL - 19 SP - 524 EP - 526 PY - 1870/01/01/ UR - http://dx.doi.org/10.1098/rspl.1870.0088 M3 - doi:10.1098/rspl.1870.0088 AU - Thomson, W. ER -