CHAPTER V. 



Sections Page 



36, 37. ANNUAL VARIATION. FOURIER COEFFICIENTS 129 



CHAPTER VI. 

 ABSOLUTE DAILY RANGES. DAILY MAXIMA AND MINIMA. 



38-43. Absolute Daily Ranges of Declination, Horizontal Force and Vertical Force 131 



44, 45. Incidence of Daily Maxima and Minima 138 



CHAPTER VII. 

 TERM-HOUR AND SPECIAL RECORDS. 



46, 47. Term-Hour Records from Mauritius 146 



48. Christchurch 147 



49-51. Antarctic Winter Quarters 148 



52. Antarctic Record during Solar Eclipse 151 



53. Pulsations 151 



54. Antarctic Record on exceptionally Quiet Day 152 



CHAPTER VIII. 

 RECORDS OF DISTURBANCES FROM CO-OPERATING STATIONS AND WINTER QUARTERS. 



55-62. Comparative Records from Falmouth, Colaba, Mauritius, and Christchurch 153 



63-76. Antarctic Records of Disturbances 158 



77-84. Various Representative Types of Antarctic Disturbances 166 



CHAPTER IX. 



MATHEMATICAL ANALYSIS OF DISTURBANCES, AND THEIR DISCUSSION. 



85. General Discussion of Theories 170 



86-88. Case of Sphere of Magnetic Material in a Uniform Field , . 170 



89, 90. Definition and Nature of Disturbances 173 



91-101. Analysis of Selected Disturbances recorded at the Co-operating Stations and at 



Winter Quarters 175 



CHAPTER X. 

 102-108. Special Type of Disturbance 186 



CHAPTER XI. 



109-114. Comparison of Antarctic Magnetic Disturbances and Aurora 193 



APPENDIX A. 

 Christchurch Term-Day Observations 201 



APPENDIX B. 



An Examination of Antarctic Disturbances from October, 1902, to March, 1903, which 



are simultaneous with Arctic Disturbances discussed by Prof. Ku. BlRKELAND . . 246 



