Leonard's New and Time-Saving Method for Subtractions of Fractions, with Many Corollaries on Simple Numbers Deduced from the Fractional Treatise
Sacramento: 1883. 71pp. 12mo. Original tan printed wrappers. Minor wear to wrappers, spine ends chipped. Small ink stamp on rear cover; small ink stamp on title page verso. Ink corrections throughout text, otherwise clean. Handy little volume designed to cut in half the time it takes to calculate fractions. The..... More