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systems. As decimal fractions may be learnet, much easier than vulgar, and are more simple, useful, and necessary, and soonest wanted in more useful branches of Arithmetic, they ought to be learned first, and Vulgar Fractions omitted, until further progress in the science shall make them necessary. It may be well to obtain a general idea of them, and to attend to two or three easy problems therein : after which, the scholar may learn decimals, which will be necessary in the reduction of currencies, computing interest and many other branches. Besides, to obtain a thorough knowledge of Vulgar Fractions, is generally a task too hard for young scholars who have made no further progress in Arithinetic than Reduction, and often discourages them. 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 through them with advantage and ease. n Simple Interest, in Federal Money, I have given several new and concise rules; some of which are pārticularly designed for the use of the compting-house. The Appendia contains a variety of rules for casting Interest, Rebate, &c, together with a number of the most easy 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. se Perfect accuracy, in a work of this nature, can hardly be expected; errors of the press, or perhaps of the author, may have escaped correction. If any such are point ed out, it will be considered as a mark of friendship and favor, by The public’s most humble and obedient Servant, NATHAN 1)Al2OI.I.

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Page.

Quest 's for exercise - - - -- . 209
Reduution . - - * - - o . 63
— of Currencies, do. of Coin - 89, 93
Rule of Three Direct, do. Inverse e 100, 108
— Double - o e - . 148

Rules, for reducing the different currencies of the
several United States, also Canada and No-
va-Scotia, each to the par of all others 96, 97

—- Application of the preceding : . . . . .98

Short Practical, for calculating Interest 126

- for casting Interest at 6 per cent. .. . 215

— for finding the contents of Superfices & Solids 220

— to reduce the currencies of the different

States, to Federal Money . . . .218

Rebate. A short method of finding the, of any giv-

en sum for months and days - - 217

Subtraction, Simple . . . . . 25

-— Compound - - - o 45

'l'able, Numeration and Pence . - 9

-—- Addition, Subtraction, and Multiplication 10

— of Weight and Measure - e - 11

— of Time and Motion . - - - 13

— showing the number of days from any day
of one month, to the same day in any other
month . • - - e - -
— showing the amount of 11. or 1 dollar, at 5 &
6 per cent, Compound Interest, for 20 years 232
----- showing the amount of 11. annuity, forborne
for $1 years or under, at 5 and 6 per cent.
Compound Interest e e . . .
— showing the present worth of fl. annuity, for
31 yrs. at 5 & 6 per c. Compound Interest ib.

—- of cents, answering to the currencies of the

United States, with Sterling, &c. . •

— showing the value of Federal Money in

other currencies . - - e . 237

Tare and 'Prett . . . . . . . Y 14
Useful Forms in transacting business - . 238
Weights of several pieces of En lish, Portuguese,
& French, gold coins, in dollars, cts. & mills 284
— of English & Portuguese gold, do. do. 285
-— of French and Spanish gold, dt, do ib.

172

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To learn this Table: Find your multiplier in the left land column, and the multiplicand a-top, and in the common angle of meeting, or against your multiplier,

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er your multipličand,

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