Who would imagine that this simple law [constancy of the velocity of light] has plunged the conscientiously thoughtful physicist into the greatest intellectual difficulties? |

—Chap. VII. |

AlbertEinstein |

# Relativity The Special and General Theory

### Albert Einstein

The physicist and humanitarian took his place beside the great teachers with the publication of *Relativity: The Special and General Theory,* Einstein’s own popular translation of the physics that shaped our “truths” of space and time.

### Contents

Biographical Note Translator’s Note Frontispiece

TRANSLATED BY ROBERT W. LAWSON |

NEW YORK: HENRY HOLT, 1920 NEW YORK: BARTLEBY.COM, 2000 |

**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****Appendices**- Bibliography