A new epitome of practical navigation ; or guide to the Indian seas. Containing, I. the elements of mathematical learning used and applied in the theory and practice of nautical affairs. II. The theory of navigation, deduced from original principles. III. The method of correcting and dtermining the longitude at sea ; by the variation of the magnetic needle. IV. The practice of navigation, in all kinds of sailing. The whole illustrated... ; suivi de Nautical propositions and institutes ; or directions for the practice of navigation : drawn, from the author's writings on this subject, and arranged in a regular and methodical order... / Samuel Dunn