Jen

ELEMENTS OF PLANE AND SOLID

GEOMETRY,

AND OF

PLANE AND SPHERICAL

TRIGONOMETRY.

TO WHICH IS ADDED.

MENSURATION, SURVEYING, AND NAVIGATION.

BY

GERARDUS BEEKMAN DOCHARTY, LL.D.,

PROFESSOR OF MATHEMATICS IN THE COLLEGE OF THE CITY OF NEW YORK; AUTHOR
OF A "PRACTICAL AND COMMERCIAL ARITHMETIC," THE "INSTITUTES OF
ALGEBRA, ""ELEMENTS OF ANALYTICAL GEOMETRY AND OF

THE DIFFERENTIAL AND INTEGRAL CALCULUS.'

Eighth Edition, Enlarged.

NEW

YORK:

HARPER & BROTHERS, PUBLISHERS,

FRANKLIN SQUARE.