THE UNIVERSITY OF CHICAGO MATHEMATICAL SERIES ELIAKIM HASTINGS MOORE GENERAL EDITOR SCHOOL OF EDUCATION TEXTS AND MANUALS GEORGE WILLIAM MYERS THE UNIVERSITY OF CHICAGO PRESS CHICAGO, ILLINOIS Agents THE BAKER & TAYLOR COMPANY NEW YORK CAMBRIDGE UNIVERSITY PRESS LONDON AND EDINBURGH For Secondary Schools By GEORGE WILLIAM MYERS Professor of the Teaching of Mathematics and Astronomy, College of ERNEST L. CALDWELL and ROBERT M. MATHEWS Instructors in Mathematics in the University High School SCHOOL OF EDUCATION MANUALS SECONDARY TEXTS THE UNIVERSITY OF CHICAGO PRESS CHICAGO, ILLINOIS |