53. Distribution of Preliminary Shocks in Space 202 54. Distribution of After-shocks in Space, Nov.-Dec. 1891 203 55. Distribution of After-shocks in Space, Jan.-Feb. 1892 204 56. Distribution of After-shocks in Space, March-April 1892 205 57. Distribution of After-shocks in Space, May-June 1892 206 58. Distribution of Audible After-shocks in Space, Nov. 1891-Dec. 1892 208 59. Map of Adjoining Regions in which Seismic Activity was affected by Japanese Earthquake 210 60. Isoseismal and Isacoustic Lines of Hereford Earthquake 216 61. Nature of Shock of Hereford Earthquake 222 62. Coseismal Lines of Hereford Earthquake 228 63. Map of Minor Shocks of Hereford Earthquake 239 64. Geology of Meizoseismal Area of Hereford Earthquake 241 65. Isoseismal Lines of Inverness Earthquake 248 66. Diagram to illustrate supposed Fault-displacement causing Inverness Earthquake 256 67. Map of Epicentres of After-shocks of Inverness Earthquake 258 68. Isoseismal Lines of Indian Earthquake 263 69. Section of Tombs in Cemetery at Cherrapunji 270 70. Time-curve of Indian Earthquake 278 71. Seismographic Record of Indian Earthquake at Rocca di Papa 282 72. Seismographic Record of Indian Earthquake at Edinburgh 283 73. Displacement of Alluvium at Foot of a Hill 287 74. Twisting of Monument at Chhatak 294 75. Epicentral Area of Indian Earthquake 303 76. Plan of Chedrang Fault 305 77. Re-triangulation of Khasi Hills 313 78. Diagram of Thrust-planes 318 79. Seismographic Record of Tokio Earthquake of 1894 329 80. Time-curves of Principal Epochs of Earthquake-waves of Distant Origin 338 A STUDY OF RECENT EARTHQUAKES. CHAPTER I. INTRODUCTION.