SCHOOLMASTER'S ASSISTANT, IMPROVED AND ENLARGED. BEING A PLAIN PRACTICAL SYSTEM OF ARITHMETICK. ADAPTED TO THE UNITED STATES. BY NATHAN DABOLL. WITH THE ADDITION OF THE FARMERS' AND MECHANICKS' BEST METHOD OF BOOK-KEEPING, DESIGNED AS A COMPANION TO DABOLL'S ARITHMETICK. BY SAMUEL GREEN. ITHACA, N. Y. : ANDRUS, WOODRUFF, & GAUNTLETT. 1913. |