Fractures in buildings, evidence of, 14, 15, 26 Fuchs, C.W.C., 102 Galli, I., 82 Geological structure and intensity of shock, connection between, 95, 106, 113, 115, 135, 164, 265 Gifu, records of Japanese after-shocks at, 183, 197 Gray, T., 295 Great Glen fault and Inverness earthquakes, connection between, 245 Greek earthquake of 1894, fault-scarp of, 340 Hayden, E., 103 Heath, T., 283, 320 Hereford earthquake, investigation of, 215; preparation for, 215, 238; isoseismal lines and disturbed area of, 216; damage caused by, 217, 294; position of originating fault, 219; nature of shock, 220; origin of double series of vibrations, 223; position and dimensions of the two foci, 224; direction of the shock, 225; coseismal lines and velocity of earth-waves, 227; sound-phenomena, 229; isacoustic lines and sound-area, 234; fore-shocks, 238; after-shocks, 240; origin of earthquake, 240; bibliography, 261 Hills, changes in aspect of, after Indian earthquake, 311 Hirata, K., 327, 331 Human beings, effects of Charleston earthquake on, 131 Hypocentre, 3 Iberian peninsula, earthquakes of, 75 Indian earthquake, investigation of, 262; isoseismal lines and disturbed area, 264; nature of shock, 266; visible earth-waves, 268; elements of wave-motion, 270; sound-phenomena, 274; velocity of earth-waves, 275; the unfelt earthquake, 280; earth-fissures, 285; displacements of alluvium, 287; sand-vents, 288; rise of river-beds, etc., 290; landslips, 291; rotation of pillars, 293; after-shocks, 296; structural changes in epicentral area, 301, 315; structure of epicentral district, 302; fault-scarps, 304; crust-fractures, 309; lakes and pools not due to faulting, 310; changes in aspects of hills, 311; revision of trigonometrical survey, 312; origin of earthquake, 317; bibliography, 319 Inverness earthquake, preparation for, 246; damage caused by, 247; fissure in ground, 247; isoseismal lines and disturbed area, 247; position of originating fault, 249; nature of shock, 250; sound-phenomena, 253; origin of earthquake, 255; after-shocks and their origin, 256; sympathetic earthquakes, 259; comparison with Japanese earthquake, 260; bibliography, 261. Investigation, Mallet's methods of, 12, 21 Isacoustic lines, 234; of Hereford earthquake, 235; of Derby earthquake, 236 Ischia, volcanic history of, 45, 70; characteristics of eruptions, 49; seismic history, 49 Ischian earthquake of 1881, investigation of, 50; isoseismal lines and disturbed area, 51; position of epicentre, 52; depth of focus, 54; nature of shock, 55; after-shocks, 56; origin of, 70; bibliography, 73 Ischian earthquake of 1883, investigation of, 56; preparation for, 57; isoseismal lines and disturbed area, 58; position of epicentre, 60; depth of focus, 61; nature of shock, 64; landslips, 64; after-shocks, 65; origin of, 70; bibliography, 73