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SCHOOLMASTER'S ASSISTANT

IMPROVED AND ENLARGED,

BEING A PLAIN

PRACTICAL SYSTEM

OF

ARITHMETIC,

ADAPTED TO THE UNITED STATES.

BY NATHAN DABOLL.

WITH THE ADDITION OF

THE

PRACTICAL ACCOUNTANT;

OR,

FARMERS AND MECHANICS

BEST METHOD OF BOOK-KEEPING;

FOR THE EASY INSTRUCTION OF YOUTH

DESIGNED

AS A COMPANION TO DABOLL'S ARITHMETIC

BY SAMUEL GREEN

STEREOTYPE PRINT,

NEW-LONDON :
PRINTED AND PUBLISHED BY SAMUEL GREEN,

Pioprielor of the Copy-Right.

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Distric. of Connecticut, st : BE

E IT REMEMBERED, That on the eleventh day of Janua

ry, in the forty-ninth year of the independence of the United States of America, SAMUEL GREEN, of said District, hath deposi

ted in this office, the title of a book, the right whereof he claims as proprietor in the words following, to wit : “ Daboll's Schoolmaster's Assistant; impruva ed and enlarged. Being a plain practical System of Arithinetic, adapted to the United States. By Na.

than Daboll. With the addition of the Practical Ac. countant; or Farmers' and Mechanics best method of Book-keep. ing; for the easy instruction of youth. Designed as a Compan ion to Daboll's Arithmetic. By Samuel Green. Stereotype Print.

In conformity to the act of Congress of the United States, enti tled, "An act for the encouragement of learning, by securing th copies of maps, charts, and books to the authors and proprietor of them, during the times the rein mentioned.

CHARLES A. INGERSOLL,

Clerk of the District of Connecticut. A true cofy of record. Examined and sealed by me.

CHARLES A. INGERSOLL,

Clerk of the District of Connecticut

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11-25-30 23046

RECOMMENDATIONS.

YALE-COLLEGE, Nov. 27, 1799. I HAVE read DaBOLL's SchoolMaster's Assistant. The arrangement of the different branches of Arithmetic is judicious and perspicuous. The author has well exa plained 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. [Now 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.

RHODE-ISLAND COLLEGE, Nov. 30, 1799. I HAVE run through Mr. DABOLL'S SCHOOLMASTER'S Assistant, and have formed of it a very favourable opinion. According to its original design. I think it well 6 calculated to furnish Schools

in general with a methodical, easy and comprehensive System of Practical Arithmetic.” 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

Now President of that Institution.

PLAINFİELD ACADEMY,

APRIL 20, 1802. I MASE use of DavOLL'S SCHOOLMASTER'S Assistant, in teaching commoni Arithmetic, and think it the best calculated for that purpose of any which has fallen within my observation,

JOHN ADAMS, Rector of

Plainfield 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.

I BECAME acquainteil with DABOLL's SchoolMASTER's Assistant, in the year 1802, and on examining it attentively, gave it iny decided preference to any other system 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 well calculated for the benefit of individuais 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.

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 endeavoured, 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 claims to scientific merit; but the authors appear to have been deficient in an important point--the practical teacher's experience. They have been too sparing of examples, especially in the first rudiments; in consequence of which, the Youns pupil is hurried through the ground rules too fast for his capacity. 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 variety 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 introduce the most simple and necessary parts, previous to thus 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 neces. sary to be understood by overy one, that I have introduced it immediately after addition of whole numbers, and also shown how to find the value of gouds therein, immediately after simple multiplication; which may be of great advantage to many, who perhaps will not have an opportunity of learning fractions.

In the arrangement of tractions, I have taken an entire 01* methol, the advantages and facility of which will sufliciently apologize for its titel ein bug to other

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