By which Thèon, or others, have long ago vitiated these Books, are corrected, and some of

Luclid's demonstrations are restored.

TO THIS LDITION ARE ALSO AXNESED,
ELEMENTS OF PLANE AND SPHERICAL TRIGONOMETRY.

PHILADELPHIA:

PUBLISHED BY JOHNSON AND WARNER,
AND SOLD AT THEIR BOOKSTORES IN PHILADELPHIA, RICHIMOND, (Vir.)

AND LEXINGTON, (Ken.)