The merchant and trader's daily companion. [electronic resource] : Containing exact and useful tables, shewing the value of any quantity of goods or wares, ready cast up, more adapted to Merchants Use, than any other extant. Calculated by an ingenious accomptant. To Which Are Prefixed, A Table of Guineas and Half Guineas, from 1, 1 and 1/2, 2, 2 and 1/2, and so on progressively to 250 and 1/2 inclusive. Together With A Table Of The Number Of Yards. In The Several Scores Of Linen. From 1, To 150. These Last Calculated Originally, and the whole book cast up in manuscript, and corrected at the press, by John Watson, bookseller. The twelfth edition.