THE RUDIMENTS OF ARITHMETIC: EMBRACING MENTAL AND WRITTEN EXERCISES, FOR BEGINNERS. PREPARED FOR THE MATHEMATICAL COURSE OF JOSEPH RAY, M.D., LATE PROFESSOR OF MATHEMATICS IN WOODWARD INSTITUTION. WILSON, HINKLE & CO., CINCINNATI: 137 WALNUT ST. NEW YORK: 28 BOND ST. Educ T118.72.730 RAY'S SERIES, EMBRACING A Thorough and Progressive Course in Arithmetic, Algebra, and the Higher Mathematics. Primary Arithmetic. Practical Arithmetic. Higher Arithmetic. Test Examples in Arithmetic. Plane and Solid Geometry. BY ELI T. TAPPAN, A.M., Pres't Kenyon College. 12mo, cloth, 276 pp. Analytic Geometry. By GEO. H. HOWISON, A.M., Prof. Elements of Astronomy. By S. H. PEABODY, A.M., KEYS. Ray's Arithmetical Key (To Intellectual and Practical), Key to Ray's New Elementary and Higher Descriptive Circulars and Price List upon Application to the Publishers. Entered according to Act of Congress, in the year 1866, by SARGENT, PREFACE. THIS work has been prepared with a view to meeting the wants of the primary and intermediate departments of large graded schools. The author has also sought to furnish a small, simple, and cheap class-book,, adapted to the requirements of pupils commencing the study of Practical Arithmetic in the common schools of the country, as well as in the graded schools of the larger towns and cities. In entering upon the study of Practical Arithmetic, as presented in the more extended works in general use, the mind of the young learner is often confused and embarrassed by a multiplicity of methods, explanations, solutions, rules, exceptions, remarks, notes, etc. To avoid this evil, it has been the constant aim, in the preparation of this work, to present each subject in one form only, and that the most concise and simple consistent with clearness. In treating each subject, a MODEL, designed to be thoroughly studied by the pupil, is given, embracing a full and lucid solution of an example, with accompanying operation, from which a general rule is deduced. The definitions are plain and simple, and as brief as mathematical exactness will admit. Mental exercises precede the practical examples, which, without being unnecessarily multiplied, are sufficiently numerous, especially in the fundamental rules, to give the pupil a thorough drill, rendering him ready, quick, and accurate in the simpler arithmetical calculations. It is not expected that the solutions and explanations given will, in all cases, preclude the necessity of additional illustra |