MENTAL

ARITHMETIC,

OR

FIRST LESSONS IN NUMBERS

FOR CHILDREN.

BY JAMES B. THOMSON, LL.D.,

AUTHOR OF PRACTICAL ARITHMETIC; HIGHER ARITHMETIC; EDITOR N
DAY'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.

BUHRIGRAD
GA

103. T484 1863

Entered according to Act of Congress, in the year 1848,
BY JAMES B. THOMSON,

in the Clerk's Office of the Northern District of New York.

STEREOTYPED BY THOMAS B SMITH

216 WLLIAN STREET, NEW YORK.