The scales of commerce and trade: ballancing betwixt the buyer and seller, artificer and manufacture, debitor and creditor, the most general questions, artificiall rules, and usefull conclusions incident to traffique: comprehended in two books. The first states the ponderates to equity and custome, all usuall rules, legall bargains and contracts, in wholesale ot [sic] retaile, with factorage, returnes, and exchanges of forraign coyn, of interest-money, both simple and compounded, with solutions from naturall and artificiall arithmetick. The second book treats of geometricall problems and arithmeticall solutions, in dimensions of lines, superficies and bodies, both solid and concave, viz. land, wainscot, hangings, board, timber, stone, gaging of casks, military propositions, merchants accounts by debitor and creditor; architectonice, or the art of building. / By Thomas Willsford Gent.

QUESTION V. If 210 L be forborn the term of 3 years, 3 mo∣neths, 3 weeks, and 3 dayes, what will be the encrease at 6 L per centum per annum?

The Products	I	Decimals 1191016 2382032
II	25011336	Yeare:
III	25378356	Moneths
IV	25463576	Weeks
V	25475773	Dayes
The totall is— 254 L 15 ss 1 ¼ d.

In all questions of this kind, seek the Decimal for the longest term of time allowed, as here 3 years, whose artificial number is 1191016, which multi••lied by 210 L (the principal lent) or by 21, lib. 1. sect. 1. parag, 4. exam. 7. as in this table and first row: in the second stands the product, viz. 25011336. to which you may annex the cipher in 210 L. it is not material, the number being one place greater then is the Radius, & yet the product one cipher defective; therefore strike off but 5 places from the right hand, and the fraction redu∣ced, the summe would prove at 3 years end 250 L 2 ss 3 d. But to proceed, the second row for the term of years multiplied by 10.14674 (the Deci∣mal

for 3 moneths) produceth in the third row of the table 25378356, the number for 3 years and 3 moneths, as noted on the right hand of the Ta∣ble; which multiplied by the Decimal 1003358 for 3 weeks, the product will be in the fourth row 25463576, the artificial number for 3 years, 3 moneths, and 3 week; and lastly, multiplied by 1000479 (the decimal for 3 dayes) the fifth row will specifie in the product 25475773, the artifi∣cial number for the whole time, viz. 3 years, 3 moneths, 3 weeks, and 3 dayes; from wh••nce se∣ver the integers, and reduce the fraction, the total appears (as in the table) 254 L 15 ss 1 ¾ d. the true compound interest for the summ and time re∣quired.