Zephirum, 57, 58 Zephyr, 59 Zepiro, 58 Zero, 26, 38, 40, 43, 45, 49, 51-62, 67 Zeuero, 58 * * * * * ANNOUNCEMENTS * * * * * WENTWORTH'S COLLEGE ALGEBRA REVISED EDITION 12mo. Half morocco. 530 pages. List price, $1.50; mailing price, $1.65 * * * * * This book is a thorough revision of the author's "College Algebra." Some chapters of the old edition have been wholly rewritten, and the other chapters have been rewritten in part and greatly improved. The order of topics has been changed to a certain extent; the plan is to have each chapter as complete in itself as possible, so that the teacher may vary the order of succession at his discretion. As the name implies, the work is intended for colleges and scientific schools. The first part is simply a review of the principles of algebra preceding Quadratic Equations, with just enough examples to illustrate and enforce these principles. By this brief treatment of the first chapters sufficient space is allowed, without making the book cumbersome, for a full discussion of Quadratic Equations, The Binomial Theorem, Choice Chance, Series, Determinants, and the General Properties of Equations. Every effort has been made to present in the clearest light each subject discussed, and to give in matter and methods the best training in algebraic analysis at present attainable. ADDITIONAL PUBLICATIONS By G. A. WENTWORTH List Mailing price price Plane and Solid Geometry (Revised Edition) $1.25 $1.40 Plane Geometry (Revised Edition) .75 .85 Solid Geometry (Revised Edition) .75 .85 Analytic Geometry 1.25 1.35 Trigonometries (Second Revised Editions) _A list of the various editions of Wentworth's Trigonometries will be sent on request._ * * * * * GINN AND COMPANY PUBLISHERS * * * * * ALGEBRA FOR BEGINNERS By DAVID EUGENE SMITH, Professor of Mathematics in Teachers College, Columbia University * * * * * 12mo, cloth, 154 pages, 50 cents * * * * * This work is intended to serve as an introduction to the study of algebra, and is adapted to the needs of the seventh or eighth school year. It is arranged in harmony with the leading courses of study that include algebra in the curriculum of the grades.