""Gauging Unmasked"" is a book written by John Ballard and published in 1812. The book provides a comprehensive guide to the rules and principles of both vulgar and decimal arithmetic, with several contractions in both. It is intended for those who wish to learn and master the basics of arithmetic, including gauging and measurement. The book covers a wide range of topics, including addition, subtraction, multiplication, division, fractions, decimals,...