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MANUALS OF ELEMENTARY SCIENCE,

MATTER AND MOTION.

BY

J. CLERK MAXWELL,

M.A., LL.D. Edin., F.R.Ss. L. & E....
Honorary Fellor of Trinity College, and Professor of Experimental

Physics in the University of Cambridge.

..

PUBLISHID UNDER THE DIRECTION 07 TEE
COXUITTEE OF GENERAL LITERATURE AND EDUCATION,
APPOINTED BY THE SOCIETY FOR PROXCT2273

CHRISTIAN KNOWLEDGE.

LONDON:
SOCIETY FOR PROMOTING CHRISTIAN KNOWLEDGE;

BOLD AT THE DEPOSITORIES :
77, GBRAT QUEEN STREET, LINCOLN'S INN FIBLDS;
4, ROYAL EXCHANGE; 48, PICCADILLY;

AND BY ALL BOOKSELLERS.
NEW YORK: POTT, YOUNG & CO.

1878
[AN Rights reserved.)

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PREFACE.

PHYSICAL SCIENCE, which up to the end of the eighteenth century had been fully occupied in forming a conception of natural phenomena as the result of forces acting between one body and another, has now fairly entered on the next stage of progress-that in which the energy of a material system is conceived as determined by the configuration and motion of that system, and in which the ideas of configuration, motion, and force are generalised to the utmost extent warranted by their physical definitions.

To become acquainted with these fundamental ideas, to examine them under all their aspects, and habitually to guide the current of thought along the channels of strict dynamical reasoning, must be the foundation of the training of the student of Physical Science.

The following statement of the fundamental doctrines of Matter and Motion is therefore to be regarded as an introduction to the study of Physical Science in general.

CONTENTS.

PAGR

CHAPTER I.
ARTICLK

Nature of Physical Science
Definition of a Material System ........
Definition of Internal and External .........
Definition of Configuration .............
Diagrams ................................

A Material Particle .....
VII. Relative Position of two Material Particles...
VIII.

Vectors................
IX. System of Three Particles ............
X.

Addition of Vectors.....
XI. Subtraction of one Vector from another .........
XII. Origin of Vectors ..........

Relative Position of Two Systems.........
XIV. Three Data for the Comparison of Two Systems..
XV. On the Idea of Space .....
XVI. Error of Descartes.........
XVII. On the Idea of Time .........................
XVIII. Absolute Space .......
XIX. Statement of the General Maxim of Physical

Science .......

CHAPTER I

ON MOTION.
XX. Definition of Displacement ...
XXI. Diagram of Displacement...............
XXII. Relative Displacement ........................................
XXIII. Uniform Displacement....................

On Motion.......

On the Continuity of Motion.......
XXVI. On Constant Velocity .....
XXVII. On the Measurement of Velocity when Variable.
XXVIII. Diagram of Velocities ...
XXI Properties of the Diagram of Velocities..............
XXX. Meaning of the Phrase " at Rest" ............

On Change of Velocity.............
XXXII. On Acceleration ....................
XXXIII. On the Rate of Acceleration ................
XXXIV. Diagram of Accelerations................
XXXV. Acceleration a Relative Term.........

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