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UNITED STATES CALCULATOR;
OR, ARITHMETIC SIMPLIFIED,
IN DOLLARS AND CENTS,
ADAPTED TO THE COMMERCE OF THE UNITED STATES,
FOREIGN AND DOMESTIC RELATIONS,
ABBREVIATED, SIMPLIFIED, AND ARRANGED ON A NEW SYSTEM,
Entered according to Act of Congress, in the year 1840, by JOHN M’NEVIN, in the Clerk's Office, of the District Court of Maryland.