ELEMENTS

OF

G E 0 M E T R Y:

CONTAINING

THE FIRST SIX BOOKS OF EUCLID,

WITH A

SUPPLEMENT

ON THE

QUADRATURE OF THE CIRCLE, AND THE

GEOMETRY OF SOLIDS:

TO WHICH ARE ADDED,

ELEMENTS OF PLANE AND SPHERICALE

TRIGONOMETRY.

BY

JOHN PLAYFAIR, F.R.S. Lond. & Edin.

PROFESSOR OF NATURAL PHILOSOPHY, FORMERLY OF MATHEMATICS, IN THE

UNIVERSITY OF EDINBURGH.

FROM THE LAST LONDON EDITION, ENLARGED,

D

PHILADELPHIA:
J. B. LIPPINCOTT & 00.

1856.

.