Tucker's Compendium of Rapid Calculations
Richmond, VA: J. W. Fergusson & Son, 1885. Hardcover. "A Newly-Discovered Method for attaining Results, without having recourse to a Multiplicity of Figures, and thereby reducing to a Minimum the Possibility of Errors in a variety of calculations made daily in the interest of Railroads, Steamship Lines, Merchants, Bankers and..... More