Mott Media has republished the version of Ray's Arithmetic from the late 1870's and early 1880's. This book includes philosophical understandings; principles and properties of numbers; and advanced study of common and decimal fractions, measurements, ratio, proportion, percentage, powers and roots, series, business math, geometry. Has challenging work for advanced students and basic work for slower students. Can be used in grades 7 and 8 as well as for high school.