THE TEACHER'S ASSISTANT; ово A SYSTEM OF PRACTICAL ARITHMETIC: WHEREIN THE SEVERAL RULES OF THAT USEFUL SCIENCE ARE A LARGE PROPORTION OF WHICH ARE IN FEDERAL MONEY. THE WHOLE DESIGNED TO ABRIDGE THE LABOUR OF TEACHERS, AND TO A NEW EDITION, WITH CORRECTIONS AND ADDITIONS BY THE AUTHON. REVISED. COMPILED BY STEPHEN PIKE. PHILADELPHIA: PUBLISHED BY M. POLOCK, No. 6 COMMERCE STREET. ENTERED according to Act of Congress, in the year 1852, by in the Office of the Clerk of the District Court of the Eastern Signs. EXPLANATION OF CHARACTERS. Significations. equal; as 20s.—L. 1. more; as 6+2=8. less ; as 8-2-6. into, with, or multiplied by ; as, 6×2-12. by (i. e. divided by) as, 6-2=3; or, 2)6(3. proportionality; as, 2: 4 :: 6 : 12. ✔or Square Root; as, 64-8. Cube Root; as, 3/64-4. Fourth Root; as, 16-2, &c. A Vinculum; denoting the several quantities over which it is drawn, to be considered jointly as a simple quantity |