Andrew Macbride: letter to Commandere J T Duckworth, dated LEVIATHAN, Port Mahon, 26 March 1799, describing a universal scale for graduating degrees on a Mercator chart.
Andrew Macbride: letter to Commandere J T Duckworth, dated LEVIATHAN, Port Mahon, 26 March 1799, describing a universal scale for graduating degrees on a Mercator chart.