By N. HENRY BLACK of the Roxbury Latin School Boston, and Professor HARVEY N. DAVIS of Harvard University.

Cloth, I2mo, illustrated, 488 pages. List price, $1.25

"In preparing this book," say the authors in the Preface, "we have tried to select only those topics which are of vital interest to young people, whether or not they intend to continue the study of physics in a college course.

"In particular, we believe that the chief value of the informational side of such a course lies in its applications to the machinery of daily life. Everybody needs to know something about the working of electrical machinery, optical instruments, ships, automobiles, and all those labor-saving devices, such as vacuum cleaners, tireless cookers, pressure cookers, and electric irons, which are found in many American homes. We have, therefore, drawn as much of our illustrative material as possible from the common devices in modern life. We see no reason why this should detract in the least from the educational value of the study of physics, for one can learn to think straight just as well by thinking about an electrical generator, as by thinking about a Geissler tube. . . .

"To understand any machine clearly, the student must have clearly in mind the fundamental principles involved. Therefore, although we have tried to begin each new topic, however short, with some concrete illustration familiar to young people, we have proceeded, as rapidly as seemed wise, to a deduction of the general principle. Then, to show how to make use of this principle, we nave discussed other practical applications. We have tried to emphasize still further the value of principles, that is, generalizations, in science, by summarizing at the end of each chapter the principles discussed in that chapter. In these summaries we have aimed to make the phrasing brief and vivid so that it may be easily remembered and easily used."

The new and noteworthy features of the book are the admirable selection of familiar material used to develop and apply the principles of physical science, the exceptionally clear and forceful exposition, showing the hand of the master teacher, the practical, interesting, thought-provoking problems, and the superior illustrations.

THE MACMILLAN COMPANY

64-66 Fifth Avenue

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Human Behavior:

A First Book in Psychology for Teachers

By STEPHEN S. COLVIN

Professor of Educational Psychology in Brown University, and

WILLIAM CHANDLER BAGLEY

Director of the School of Education in the University of Illinois

Cloth, I2mo, 336 pages, $I.00

"I shall be surprised if this book does not attract attention at once," writes Mr. H. B. Wilson, Superintendent of Schools, Decatur, Ill. "I like the topics it takes up, the organization of these topics, and the point of view it maintains. The summaries and the exercises and questions at the conclusions of the various chapters adapt it well for class instruction. I believe we have in this book a text which will enable a good many high schools to offer a course for intending teachers such as they have not been able to organize for want of a suitable text."

The purpose of the authors in writing the book, as stated in the preface, has undoubtedly been attained and their plan successfully carried out. "It is hoped that the book may prove useful to the large numbers of young men and young women who each year enter the service of the public schools. It has, indeed, been written with a distinct recognition of the immaturity and inexperience which these beginning teachers represent. Every effort has been made (I) to select the topics that are most closely related to the work of teaching; (2) to treat these topics concretely, enforcing each principle with a wealth of illustration drawn partly from class-room practice and partly from the affairs of everyday life; and (3) to simplify the terminology, without, at the same time, sacrificing accuracy of statement."

THE MACMILLAN COMPANY

Publishers 64-66 Fifth Avenue New York

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