The irish comes commercii, [electronic resource] : or trader's-companion. Containing I. 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 Edward Hatton, Gent. II. Tables of Exchange. In two Parts. I. English Money Exchanged into Irish. 2. Irish Money Exchanged into English. Each by Addition only, for any Sum from 300 Pounds to I Penny, and at the several Rates, whether Quarters or Eighths, from Five per Cent. to Eleven per Cent. III. Tables of Commission at the several Rates mostly used in Ireland. IV. An Index to Interest. Containing Tables of Simple Interest, at 5, 6, and 7 per Cent. from 1 Day to 30 Days, and for 40, 50, 60, 70, 80, 90 Days, and 1 Year. By E. Hatton, Gent. Together with Tables of Interest at the same Rates, for 3, 6 and 9 Months. To all which is prefixed, The New Table of Coin, as the same was made current by the Lords Justices Proclamation from the 8th Day of July, 1751. Together with a Table of the Number of Yards in the several Scores of Linen, from 1 to 150. The Tables of Exchange, Commission, and Coin Calculated originally: All the other Tables cast up in Manuscript, and the whole work corrected at the press, by John Watson, Bookseller.