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MENTAL

ARITHMETIC,

OR

FIRST LESSONS IN NUMBERS

FOR CHILDREN.

BY JAMES B. THOMSON, LL.D.,
AUTHOR OF PRACTICAL ARITHMETIC; HIGHER ARITHMETIC; EDITOR -

DAT'S SCHOOL ALGEBRA; LEGENDRE'S GEOMETRY, ETC.

ONE HUNDRED AND TWENTY-FIFTH EDITION.

NEW YORK:
IVISON, PHINNEY & COMPANY,
48 & 50 WALKER STREET.

CHICAGO:
8. C. GRIGGS & COMPANY,
89 & 41 LAKE STREET.

1863.

BUHR/OKTV

} 103. .1484 1563

Entered according to Act of Congress, in the your 1848,

BY JAMES B. THOMSON, in the Olerk'Omon of the Northern District of New York.

STEREOTYPED BY THOMAS B BMITA
216 W LLLAN STRED, NEW YORK.

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