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. TABLE OF CONTENTS, N J’age, Annuities or Pensions, at Compound Interest . 205 Arithmetical progression - - - - 194 Characters, Explanation of - - - - 14 Commission - - - - 124 Conjoined Proportion - - - Contractions in - - - - 57. Quest 's for exercise - - - -- . 209 Rules, for reducing the different currencies of the —- Application of the preceding : . . . . .98 Short Practical, for calculating Interest 126 - for casting Interest at 6 per cent. .. . 215 States, to Federal Money . . . .218 Rebate. A short method of finding the, of any giv- en sum for months and days - - 217 -—- 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 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 14 172 |