HATC

Presented by HON. D. BETHUNE DUFFIELD.

From Library of Rev. Geo. Duffield, D.D.

UNIVERSITY PROFESSOR OF MATHEMATICS AND NATURAL PHILOSOPHY IN

HARVARD UNIVERSITY.

BOSTON.

JAMES MUNROE AND COMPANY.

M DCCC XXXVI.

Entered according to Act of Congress, in the year 1836,

By James MUNROE & Co., In the Clerk's Office of the District Court of the District of Massachusetts.