FLUCTUATIONS IN THE SHEEP POPULATION OF NEW SOUTH WALES, 1860–1940: A PRBLIMINAEY STUDY : I. Introduction: II. Trend and Short-Term Movements: III. Types of Oscillatory Movement: IV. Serial Correlation. V. The Data Available: VI. Long-Term Factors: VII. Short-Term Movements: VIII. A Suggested Explanation: IX. The Random Element: X. Summary.