Title: Practical Arithmetic; in four books.  I. Of whole numbers, weights, and measures.  II. Fractions, Vulgar and Decimal.  III. Mercantile Arithmetick. IV. Extractions, Progressions, Logarithms, &c. Extracted from the larger entire treatise, carried on by subscription, and adapted to the commerce of Ireland, as well as that of Great Britain. For the use of schools