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SCHOOLMASTER'S ASSISTANT :

IMPROVED AND ENLARGED.

BEING A PLAIN

PRACTICAL SYSTEM

OF

ARITHMETIC;

ADAPTED TO THE UNITED STATES.

STEREOTYPE EDITION.'

BY NATHAN DABOLL.'

NEW-LONDON:

PRINTED AND PUBLISHED BY SAMUEL GREEN, PROPRIETOR

OF THE COPY RIGHT.

1815.

.......
J. F. & C. Starr, Stereotype Founders... Hartforcha

L. S.

DISTRICT OF CONNECTICUT, 39.

BE IT REMEMBERED, That on the twentyfarst day of October, in the thirty-sixth year

of the Independence of the United States of America, SAMUEL Gruen, of said District, hath deposited in this office the ticle of a Book, the right whereof he claims as Proprie. tor, in the words folio ring, to wit :- Daboll's Schoolmaster's Assistant : improved and enlarged. "Being a plain practical system of Arithmetic: adapted to the United States. Stereotype Edition. By Nathan DA

la conformity to the Act of the Congress of the United Sates, entitled, “ An Act for the encouragement of learninny by securing the copies of Maps, Charts and Books, to the Authors and proprietors of them during the times tikrein mentioned."

HENRY W. EDWARDS,

Clerk of the District of Connecticut. A tue copy of Record : Examined and sealed by me,

H. W. EDWARDS, Clerk of the Dist. of Conn.

BOLL

6-12-45 52944 PLAINFIELD ACADEMY, APRIL 20, 1802. I MAKE use of DABOLI'S SCHOOLMASTER's Assistant, in teaching common Arithmetic, and think it the best calculated for that purpose of any which has fallen within my observation.

JOHN ADAMS, Rector of

Plainfieid Academy. [Now Principal of Phillips' Academy, Andover, Mass.

BILLERICA ACADEMY, (MASS.) DEC. 10, 1807. HAVING examined Mr. DABOLL's System of Arithmetic, I am pleased with the judgment displayed in his method, and the perspicuity of his explanations, and thinking it as easy and comprehensive a system as any with which I am acquainted, can cheerfully recommend it to the patronage of Instructors.

SAMUEL WHITING,
Teacher of Mathematics.

FROM MR. KENNEDY, TEACHER OF MATHEMATICS.

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I BECAME acquainted with DABOLL'S SCHOOLMASTER’S Assistant, in the year 1802, and on examining it attentively, gave it my decided preference to any other systern extant, and immediately adopted it for the pupils under my. charge ; and since that time have used it exclusively in elementary tuition, to the great advantage and improvement of the student, as well as the ease and assistance of the Preceptor. I also deem it equally weil calculated for the benefit of individuals in private instruction; and think it my duty to give the labour and ingenuity of the author the tribute of my hearty approval and recommendation.

ROGER KENNEDY. New-York, March 20, 1811.

RECOMMENDATIONS.

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YALE-COLLEGE, Nov. 27, 1799. I HAVE read DABOLL'S SCHOOLMASTER'S ASSISTÁNT." The arrangement of the different branches of Arithmetic is judicious and perspicuous. The author has well explained Decimal Arithmetic, and has applied it in a plain and elegant manner in the solution of various questions, and especially to those relative to the Federal Computation of money. I think it will be a very useful book to Schoolmasters and their pupils.

JOSIAH MEIGS, Professor of

Mathematics and Natural Philosophy. [Since Surveyor-General of the United States.

I HAVE given some attention to the work above mentioned, and concur with Mr. Professor Meigs in his opinion of its merit.

NOAH WEBSTER. New Haven, December 12, 1799.

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RHODE-ISLAND COLLEGE, Nov. 30, 1799. I HAVE run through Mr. Davoll's ScHOOLMASTER'S ASSISTANT, and have formed of it

very

favorable opinion. According to its original design, I think it well si calculated to furnish Schools in general with a methodical, easy and comprehensive System of Practical Arith metic.” I therefore hope it may find a generous patronage, and have an extensive spread.

ASA MESSER, Professor of the Learned Languages, and Teacher of Mathematics.

(President of that Institution.]

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THE design of this work is to furnish the schools of the United States with a methodical and comprehensive system of Practical Arithmetic, in which I have endeaYoured, through the whole, to have the rules as concise and familiar, as the nature of the subject will permit.

During the long period which I have devoted to the instruction of youth in Arithmetic, I have made use of various systems which have just claiins to scientific mert; but the authors appear to ba e been deficient in an nportant point--the practical teacher's experience.--d'hey have been too sparing of examples, especially in he first rudiments; in consequence of which, the you.se

upil is hurried through tie ground rules too fast for his. i apacity. This objection I have endeavoured to obviate in the following treatise.

In teaching the first rules, I have found it best to encourage the attention of scholars by a varict of easy and familiar questions, which might serve to strengthen their minds as their studies grow more arduous.

The rules are arranged in such order as to introluce the most simple and necessary parts, previous to those which are more abstruse and dificult.

To enter into a detail of the whole work would be tedious ; I shall therefore notice only a few particulars, and refer the reader to the contents.

Although the Federal Coin is purely decimal, it is so nearly allied to whole numbers, and so absolutely necessary to be understood by every one, that I have introduced it immediately after ad lition of whole numbers, and also shown how to find the value of goods therein, immediately after simile multiplication; which may le of great advantage t) many, who perhaps will not haie an opportunity of learning fractions.

In the arrangement of fractions, I have taken an entire new method, the advantayes and facility of which will aufficiently apologize for its not being according to other

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