TREATISE ON NAVIGATION AND NAUTICAL ASTRONOMY, ADAPTED TO PRACTICE, AND TO THE PURPOSES OF WITH AN EXTENSIVE SERIES OF EXAMPLES FOR EXERCISE, AND ALL THE TABLES FOURTH EDITION, WITH RULES AND EXAMPLES ADAPTED TO THE NAUTICAL ALMANAC BY EDWARD RIDDLE, F.R.A.S., MASTER OF THE NAUTICAL SCHOOL, ROYAL HOSPITAL, GREENWICH. LONDON: ROBERT BALDWIN, 47, PATERNOSTER-ROW. MDCCCXLII. ΤΟ THE RIGHT HONOURABLE THOMAS EARL OF HADDINGTON; ADMIRAL THE RIGHT HONOURABLE SIR GEORGE COCKBURN, G.C.B.; VICE-ADMIRAL SIR WILLIAM HALL GAGE, G.C.H.; REAR-ADMIRAL SIR GEORGE FRANCIS SEYMOUR, Kt., G.C.H.; CAPTAIN HON. WILLIAM GORDON; AND THE RIGHT HONOURABLE HENRY THOMAS LOWRY CORRY; THE LORDS COMMISSIONERS FOR EXECUTING THE OFFICE OF LORD HIGH ADMIRAL OF THE UNITED KINGDOM OF GREAT BRITAIN AND IRELAND, THIS NEW AND IMPROVED EDITION OF A WORK DESIGNED TO IMPART TO THE PROFESSIONAL EDUCATION OF BRITISH SEAMEN A MORE SCIENTIFIC IS, WITH THEIR LORDSHIPS' PERMISSION, RESPECTFULLY INSCRIBED, BY THE AUTHOR, |