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CONTENTS
1. Touch and Sight: The Earth and the Heavens
2. What Happens and What is Observed 16
3. The Velocity of Light 24
4. Clocks and Foot-rules 32
5. Space-Time 41
6. The Special Theory of Relativity 48
7. Intervals in Space-Time 60
8. Einstein’ s Law of Gravitation 71
9. Proofs of Einstein’s Law of Gravitation 82
10. Mass, Momentum, Energy, and Action 89
11. The Expanding Universe 100
12. Conventions and Natural Laws 110
13. The Abolition of ‘Force’ 118
14. What is Matter? 126
15. Philosophical Consequences 133
