NAVIGATION, SURVEYING, BEIGHTS, AND DISTANCES,
AND SPHERICAL ASTRONOMY,

AND PARTICULARLY ADAPTED TO EXPLAINING

THE CONSTRUCTION OF BOWDITCH'S NAVIGATOR, AND THE

NAUTICAL ALMANAC.

BY

BENJAMIN PEIRCE, A. M.,

Perkins Professor of Astronomy and Mathematics in Harvard University.

Entered according to Act of Congress, in the year 1852, by

JAMES MUNROE & COMPANY,

in the Clerk's Quice of the District Court of the District of Massachusetts. Quice of

BOSTON:

THURSTON, TORRY, AND EMERSON, PRINTERS.

PLANE TRIGONOMETRY.

CONTENTS:

CHAP.

I. General Principles of Plane Trigonometry

II. Sines, Tangents, and Secants

III. Right Triangles

IV. General Formulas.

V. Values of the Sines, Cosines, Tangents, Cotangents, Secants,
and Cosecants of certain Angles

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