Feby Set 1837

2

BY WHICH THEON, OR OTHERS, HAVE LONG AGO VITIATED THESE BOOKS, Are cor-
RECTED, AND SOME OF EUCLID'S DEMONSTRATIONS ARE RESTORED.

BY ROBERT SIMSON, M. D.
Emeritus Professor of Mathematics in the University of Glasgow.

TO THIS EDITION ARE ALSO ANNEXED,

ELEMENTS OF PLANE AND SPHERICAL TRIGONOMETRY.

PHILADELPHIA:

PUBLISHED BY

ROBERT DESILVER, NO. 110, WALNUT STREET,

AND

THOMAS DESILVER, no. 253, MARKET STREET.

J. Maxwell, Printer.