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The Errors, by which THEON, or others, have long ago
vitiated these Books, are corrected,
A L S 0
THE BOOK OF
E UCL I D'S
DA TA, C
In like manner corrected.
To this FIFTH EDITION are also annexed,
ELEMENTS OF PLAIN and SPHERICAL TRIGONOMETRY.
E DIN BURGH
Printed for J. Nourse, London, and J. BALFOUR, Edinburgh,