THE

AMERICAN

PRACTICAL NAVIGATOR,

BEING AN

ΕΡΙΤΟΜΕ

OF

NAVIGATION AND NAUTICAL ASTRONOMY.

BY

NATHANIEL BOWDITCH, LL. D.,

Fellow of the Royal Societies of London, Edinburgh, and Dublin; of the Astronomical Society in London; of the
American Philosophical Society, held at Philadelphia; of the American Academy of Arts and Sciences;

of the Connecticut Academy of Arts and Sciences; of the Literary and Philosophical Society

of New York; Corresponding Member of the Royal Societies of Berlin, Palermo, &c.

REVISED BY ORDER OF THE

BUREAU OF NAVIGATION,

NAVY DEPARTMENT.

ICH
$2.25

WASHINGTON:

GOVERNMENT PRINTING OFFICE

1888.