RT Book, Whole DB /z-wcorg/ DS http://worldcat.org ID 326509121 LA English T1 The teachers assistant, or, A system of practical arithmetic; : wherein the several rules of that useful science, are illustrated by a variety of examples, a large proportion of which are in Federal money. : The whole designed to abridge the labour of teachers, and to facilitate the instruction of youth. A1 Pike, Stephen,, Pike, Stephen,, Brown, William,, Johnson & Warner,, PB Published by Johnson and Warner, no. 147, Market-Street; and by Stephen Pike, no. 22, North Second-Street. W. Brown, printer, Church-alley. PP Philadelphia: YR 1811