Plainfeld Academy, April 20, 1802 DARQLL's SchoolMASTER's Assistant on Arithmetic, and think it the best cal [pose of any which has fallen within my JOHN ADAMS, Rector of Plainfield Academy f Philips' Academy, Andover , Max, ca Academy, (Mass.) Dec. 10, 1807. I Mr. DABOLL's System of Arithmetic , 10 judgment displayed in his method, of his explanations, and thinking it as isive a system as any with which I am erfully recommend it to the patronage SAMUEL WHITING, Teacher of Mathematics The design of this work is to furnish the se United States with a methodical and comprehe of Practical Arithmetic, in which I have e through the whole, to have the rules as concis liar as the nature of the subject will permit. During the long period which I have devot struction of youth in Arithmetic, I have made u systems which have just claims to scientific m authors appear to have been deficient in a paint--the practical teacher's experience. Th too sparing of examples, especially in the firs in consequence of which, the young pupil is hur the ground rules too fast for his capacity. T I have endeavoured to obviate in the followin In teaching the first rules, I have found courage the attention of scholars by a variet familiar stions, which might serve to stre minds as their studies grew more arduous. The rules are arranged in such order as to inost simple and necessary parts, previous to are more abstruse and difficult. To enter into a detail of the whole work dious; I shall therefore notice only a few pa refer the reader to the contents. Although the Federal Coin is purely de nearly allied to whole numbers, and so absolu to be understood by every one, that I have immediately after addition of whole num] shown how to find the value of goods thereir after simple multiplication; which may be o tage to many, who perhaps will not have an learning fractions. In the arrangement of fractions, I have to new method, the advantages and facility sufficiently apologize for its not being are A 2 medy, Teacher of Mathematics. ced with DABOLL'S SCHOOL MASTER'S ar 1802, and ou examining it attensive preference to any other system -ly adopted it for the pupils under my at time have used it exclusively in the great advantage and improves well as the ease and assistance of deem it equally well calculated for Is in private instruction, and think labour and ingenuity of the author v approval and recommendation, ROGER KENNEDY , 1811. Bart Brod Cha Com Con Coli Dis systeins, As decimal fractions may be learned much easier other branches. I have therefore placed a few problems in Fractions, according to the method above hinted; and after going through the principal mercantile rules, have treated upon Vulgar Fractions at large, the scholar being now capable of going thrqugh them with advantage and ease. In Simple Interest, in Federal Money, I have given several new and concise rules ; some of which are particularly dorigned for the use of the compting-house. The Appendix contains a variety of rules for casting Interest, Rebate, &c. together with a number of the most bany and useful problems, for measuring superficies and solids, examples of forms commonly used in transacting business, useful tables, &c. which are designed as aids in the common business of life. Perfect accuracy, in a work of this nature, can hardly ha expected ; errors of the press, or perhaps of the author, inay have escaped correction. If any such are pointed out, it will be considered as a park of friendship and fayour, ly The public's most humble NATHAN DABOLI.. TABLE OF CONTENTS al fractions may be learned much easier , ined first, and Vulgar Fractions omitted, ss in the science shall make them ne- : well to obtain a general idca of them, 1 or three easy problems therein; after may learn decimals, which will be nę , young scholars who rules ; some of which are particularly Annuities or Pensions, at Compound Interest, Coins of the United States, Weights of, Evolution or Extraction of Roots, Fractions, Vulgar and Decimal, Pernutation of Quaalities. . together with a number of the most blems, for measuring superficies and forms commonly used in transucting s, &c. which are designed as aids in in a work of this nature, can hardly Ic's most humble NATHAN DABOLI SC Questions for Exercise, 187 of Currencies, do, of Coin, 82, 86 90,97 Rules for reducing the different currencies of the several United States, also Canada and Nova Scotia, each to the par Short Practical, for calculating Interest, for casting Interest at 6 per cent, for finding the contents of Superfices and Solids, to reduce the currencies of the different states to Fede- Rebate, a short method of finding the, of any given sum, for Addition, Subtraction, and Multiplication, showing the number of days from any day of one month to the same day in any other month, showing the amount of 11. or 1 dollar, at 5 and 6 per cent. Compound Interest, for 20 years, showing the amount of 11. annuity, forborne for 31 years 221 of Cents, answering to the currencies of the United showing the value of Federal Money in other currencies, Useful Forms in transacting business, Weights of several pieces of English, Portuguese, and French "Gold Coins, in dollars, cents, and mills, of English and Portuguese Gold, do. do. 223 ods of Dinone. ise, 187 DABOLL'S incies, do, of Coin, 82,96 90,97 he different currencies of the several United Canada and Nova Scotia, each to the par e contents of Superfices and Solids, 208 currencies of the different States to Fede- btraction, and Multiplication, Motion, number of days from any day of one month amount of ll. or 1 dollar, at 5 and 6 per mount of 11. annuity, forborne for 31 years - and 6 per cent. Compound Interest, 221 "resent worth of 1l. annuity, for 31 years, wering to the currencies of the United 20 Hundreds of Mlelong. y Millions. Voer Thousands. 923 |