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FOUR DISCOVERERS AND FOUNDERS OF GEOMETRY

(Sec pages 324-332)

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Introductory Algebra
School Algebra
Plane Geometry .
Solid Geometry
Plane and Solid Geometry
Plane Trigonometry (without Tables)
Plane Trigonometry and Tables .
Plane Trigonometry with Surveying and Tables
Plane and Spherical Trigonometry and Tables
Plane and Spherical Trigonometry with Sur-

veying and Tables .
Logarithmic and Trigonometric Tables

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Copyright, 1904, by Charles E. Merrill Co.

[6]

HARVARD
UNIVERSIT
LIBRARY

PREFACE

ONE of the main purposes in writing this book has been to try to present the subject of Geometry so that the pupil shall understand it not merely as a series of correct deductions, but shall realize the value and meaning of its principles as well. This aspect of the subject has been directly presented in some places, and it is hoped that it pervades and shapes the presentation in all places.

Again, teachers of Geometry generally agree that the most difficult part of their work lies in developing in pupils the power to work original exercises. The second main purpose of the book is to aid in the solution of this difficulty by arranging original exercises in groups, each of the earlier groups to be worked by a distinct method. The pupil is to be kept working at each of these groups till he masters the method involved in it. Later, groups of mixed exercises to be worked by various methods are given.

In the current exercises at the bottom of the page, only such exercises are used as can readily be solved in connection with the daily work. All difficult originals are included in the groups of exercises as indicated above. Similarly, in the writer's opinion, many of the numeri

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