# Space Time and Gravitation

SPACETIME
AND
GRAVITATION
An Outline of the General Relativity Theory
by
A. S. Eddington, M.A., M.Sc., F.R.S.
Plumian Professor of Astronomy and Experimental Philosophy, Cambridge
CAMBRIDGE AT THE UNIVERSITY PRESS 1920
Cambridge University Press
C. F. Clay, Manager
London : Fetter Lane, E.C. 4
New York : The Macmillan Co.
| Bombay | |
| Calcutta | Macmillan And Co., Ltd. |
| Madras | |
Toronto : The Macmillan Co. Of Canada, Ltd.
Tokyo : Maruzen-Kabushiki-Kaisha
All Rights Reserved
ECLIPSE INSTRUMENTS AT SOBRAL
Contents
* Eclipse Instruments at Sobral................................................................................................................................................................................................................................................................................................................................................................................................Frontispiece
* ProloguePAGE
* What is Geometry?................................................................................................................................................................................................................................................................................................................................................................................................1
* Chapter I
* The FitzGerald Contraction................................................................................................................................................................................................................................................................................................................................................................................................17
* Chapter II
* Relativity................................................................................................................................................................................................................................................................................................................................................................................................30
* Chapter III
* The World of Four Dimensions................................................................................................................................................................................................................................................................................................................................................................................................45
* Chapter IV
* Fields of Force................................................................................................................................................................................................................................................................................................................................................................................................63
* Chapter V
* Kinds of Space................................................................................................................................................................................................................................................................................................................................................................................................77
* Chapter VI
* The New Law of Gravitation and the Old Law................................................................................................................................................................................................................................................................................................................................................................................................93
* Chapter VII
* Weighing Light................................................................................................................................................................................................................................................................................................................................................................................................110
* Chapter VIII
* Other Tests of the Theory................................................................................................................................................................................................................................................................................................................................................................................................123
* Chapter IX
* Momentum and Energy................................................................................................................................................................................................................................................................................................................................................................................................136
* Chapter X
* Towards Infinity................................................................................................................................................................................................................................................................................................................................................................................................152
* Chapter XI
* Electricity and Gravitation................................................................................................................................................................................................................................................................................................................................................................................................167
* Chapter XII
* On the Nature of Things................................................................................................................................................................................................................................................................................................................................................................................................180
* Appendix
* Mathematical Notes................................................................................................................................................................................................................................................................................................................................................................................................202
* Historical Note................................................................................................................................................................................................................................................................................................................................................................................................210