BY JAMES THOMSON, LL.D.

PROFESSOR OF MATHEMATICS IN GLASGOW COLLEGB;.
AUTHOR OP ELEMENTS OP PLANE AND SPHERICAL TRIGONOMETRY;

INTRODUCTION 10 MODERN GEOGRAPHY; BTC.

Eighteenth Edition,

Adapted to the Present System of Weights, Measures, and Currency.

BELFAST:

STEREOTYPED AND PRINTED BY

SIMMS AND M'INTYRE, DONEGALL STREET.

1837.

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