THE

ELEMENTS OF EUCLID,

VIZ.

THE FIRST SIX BOOKS,

TOGETHER WITH

THE ELEVENTH AND TWELFTH.

THE ERRORS BY WHICH THEON, OR OTHERS, HAVE LONG AGO VITIATED
THESE BOOKS, ARE CORRECTED;

AND SOME OF EUCLID'S DEMONSTRATIONS ARE RESTORED.

ALSO,

THE BOOK OF

EUCLID'S DATA,

IN LIKE MANNER CORRECTED.

BY ROBERT SIMSON, M.D.

EMERITUS PROFESSOR OF MATHEMATICS IN THE UNIVERSITY OF GLASGOW.

A NEW EDITION,

CAREFULLY REVISED AND IMPROVED.

TO WHICH ARE NOW ADDED,

A TREATISE ON THE CONSTRUCTION OF THE TRIGONOMETRICAL
CANON; AND A CONCISE ACCOUNT OF LOGARITHMS.

BY MR. JOHN CHRISTISON,

TEACHER OF THE MATHEMATICS.

GLASGOW:

Printed by Andrew and James Duncan,

FOR BELL AND BRADFUTE, SILVESTER DOIG AND ANDREW STIRLING,
EDINBURGH; AND ANDREW & JOHN M. DUNCAN, GLASGOW.

mum⌁

1817.