**RELATIVITY:
THE SPECIAL AND GENERAL THEORY**

### Written by A. Einstein (1879-1955)

### Translated by ROBERT W. LAWSON

### First published by Henry Holt and Company, New York (1920)

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**CONTENTS**

**Part I: The Special Theory of
Relativity**

**Physical Meaning of Geometrical Propositions****The System of Co-ordinates****Space and Time in Classical Mechanics****The Galileian System of Co-ordinates****The Principle of Relativity (In the Restricted Sense)****The Theorem of the Addition of Velocities Employed in Classical Mechanics****The Apparent Incompatibility of the Law of Propagation of Light with the Principle of Relativity****On the Idea of Time in Physics****The Relativity of Simultaneity****On the Relativity of the Conception of Distance****The Lorentz Transformation****The Behaviour of Measuring-Rods and Clocks in Motion****Theorem of the Addition of Velocities. The Experiment of Fizeau****The Heuristic Value of the Theory of Relativity****General Results of the Theory**- Experience and the Special Theory of Relativity
- Minkowski’s Four-Dimensional Space

**Part II: The General Theory of
Relativity**

- Special and General Principle of Relativity
- The Gravitational Field
- The Equality of Inertial and Gravitational Mass as an Argument for the General Postulate of Relativity
- In What Respects Are the Foundations of Classical Mechanics and of the Special Theory of Relativity Unsatisfactory?
- A Few Inferences from the General Theory of Relativity
- Behaviour of Clocks and Measuring Rods on a Rotating Body of Reference
- Euclidean and Non-Euclidean Continuum
- Gaussian Co-ordinates
- The Space-Time Continuum of the Special Theory of Relativity Considered as a Euclidean Continuum
- The Space-Time Continuum of the General Theory of Relativity Is not a Euclidean Continuum
- Exact Formulation of the General Principle of Relativity
- The Solution of the Problem of Gravitation on the Basis of the General Principle of Relativity

**Part III: Considerations on the
Universe as a Whole**

- Cosmological Difficulties of Newton’s Theory
- The Possibility of a “Finite” and Yet “Unbounded” Universe
- The Structure of Space According to the General Theory of Relativity

**Appendices**

- Simple Derivation of the Lorentz Transformation
- Minkowski’s Four-Dimensional Space (“World”)
- The Experimental Confirmation of the General Theory of Relativity

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I shall be commenting on this book one chapter at a time.