Gauging unmasked. Which shews all the necessary rules in vulgar and decimal arithmetic, with several contractions in both. The extraction of the square and cure roots: stereometry, or The whole art of gauging, by the pen and sliding-rule: with the forms and definitions: the method of keeping the stock-book for ale and x-waters: tables of cylinders and areas of circles and squares. The whole designed for the use and service of the revenue-officers, being calculated according to 217.6 the solid inches contained in the liquid gallon, now used in Ireland. By John Ballard, excise-officer. Printed and published by order of the Right Honourable and Honourable the Chief Commissioners and Governors of His Majesty's Revenue of Ireland.