Introduction
Chapter 1 The History of Emergence
EMERGENCE PROCESS OF ZHANG HENG'S SEISMOSCOPE
ZHANG HENG'S TWO SIMPLE EARTHQUAKE CONCEPTS��
MANUFACTURING OF THE SEISMOSCOPE
Scientific Thought to Detect Earthquake by Suspensions
Trigger Mechanism Detecting Weak Signals An Innovation in Technology
Recording Method in Seismometry
INFLUENCE OF ZHANG HENG'S SEISMOSCOPE
Deepening the Understanding of Earth quake
Important Progress in Earthquake Records
Weakening of Conception of God's Punishment

Chapter 2 Historical Materials and Investigation
HISTORICAL RECORDS
Records of Many Historical Materials
Scientific Connotation of Records in Ancient Literatures
ARCHEOLOGICAL STUDY
Excavation of Ling Observatory
Unearthed Cultural Relics
SEISMOLOGICAL STUDY

Chapter 3 Disappearance & ScientificValue
A SHORT PERIOD OF DUTY OF THE SEISMOSCOPE
DECLINE OF HAN DYNASTY AND DISAPPEARANCE OF THE SEISMOSCOPE
Big Fire in Luoyang and Coins Forged with Copper Wares Destroyed
The 30-year Heavy Fighting
SCIENTIFIC VALUE AND HISTORICAL EFFECT OF ZHANG HENG'S SEISMOSCOPE
Scientific Value
Birth of Modern Seismograph

Chapter 4 Restoration Research
SCIENTIFIC TRAIN OF THOUGHTS FOR RESTORATION RESEARCH
Determination of Working Principle
Scientific Train of Thought to Establish the Restored Model
STRUCTURAL RESTORATION
Basic Form of Structure
Internal Structure
RESTORATION OF FORMATION
Phoenix on the Top Lid
Surface Ornamentations
Toad Feet of Seismoscope
SCIENTIFIC TESTING
CONCLUSIONS
REFERENCES