OF

ANALYTICAL GEOMETRY,

AND OF THE

DIFFERENTIAL AND INTEGRAL

CALCULUS,

BY

GERARDUS BEEKMAN DOCHARTY, LL.D.,

PROFESSOR OF MATHEMATICS IN THE NEW YORK FREE ACADEMY,
AND AUTHOR OF A PRACTICAL AND COMMERCIAL ARITHMETIC,

THE INSTITUTES OF ALGEBRA, AND THE ELE-
MENTS OF GEOMETRY AND TRIGONOMETRY.

NEW YORK:

HARPER & BROTHERS, PUBLISHERS,

FRANKLIN SQUARE.