Α KEY ΤΟ DILWORTH'S ARITHMETIC; WHEREIN EVERY QUESTION IS WORKED OUT AT FULL LENGTH, IN A SHORT AND COMPREHENSIVE MANNER: CONTAINING, BESIDE, SOLUTIONS TO MANY ORIGINAL QUESTIONS INTRODUCED IN THE BEST EDITION OF THAT WORK, ADAPTED TO THE AMERICAN ARITHMETICIAN. BY A TEACHER OF ARITHMETIC, IN NEW-YORK. NEW-YORK: Printed and published by SMITH & FORMAN, mmm |