Hattori, I., on the large earthquakes of Japan, 244 Haughton, Prof., list of active volcanoes of, 227 — method of finding earthquake origins of, 209 Hills, on the want of support on the face of, 136 Höfer, on an earthquake at Belluno, 225 Hoffmann, F., on the barometer and earthquakes, 267 Hooke, on earthquake motion, 42 Hopkins, on the thickness of the earth’s crust, 284 Humboldt, on meteors and earthquakes, 261 — on the barometer and earthquakes, 267 — on volcanoes and earthquakes, 279 Imagination, effect of earthquakes on the, 2 Instruments, direction of motion derived from, 198 Intensity, on earthquake, 51, 71 — seismic curve of, for Kioto, 242 Isoseismic circles, definition of, 10 — areas, definition of, 10 Kluge, on sea waves, 175 — on earthquake frequency, 246 — on simultaneous earthquakes, 248 — on earthquakes and sun spots, 263 — on earth pulsations, 339 Kreil, pendulum seismometer of, 25 Lakes, on disturbances in, 154 Land, effect of earthquakes on, 146–162 — on the reason of movements of, 162 — on cracks and fissures formed in, 146 Level, on the use of for earth pulsations, 328 Literature, on seismic, 6 — on Japanese earthquake, 7 Mallet, R., on area of disturbance as a test of seismic energy, 78 — on clock stopping, 36 — list of works on earthquakes of, 5 — curve of seismic energy of, 238 — definition of earthquake of, 43 — on earthquake frequency, 243 — on the influence of the heavenly bodies on earthquakes, 253 — on maximum depth of origin, 218 — on pendulum seismometers, 20 — projection seismometer of, 17 — on the Neapolitan earthquake, 69, 77, 83, 97, 103, 132, 142, 218, 280 — on sea waves, 170 — on the swing of mountains, 135 — on propagation from a fissure, 217 Mallet on the temperature of focal cavity, 84 Malvasia, M. le Conte, on earth tremors, 316 Martin, D. S., on the New England earthquake of 1874, 142 Meizoseismic area, definition of, 10 Melzi, on curves of microseismic motion, 322 Meteors, on earthquakes and, 260 Microseismic movements, on cause of, 324 Milne, D., on the Lisbon earthquake, 87 — on earthquake synchronism, 247 Mitchell, on earthquake motion, 42 Moon, effect of, on earthquakes, 251, 285 Mountains, on the swing of, 135 Naumann, E., on meteors and earthquakes, 261 — on sun spots and earthquakes, 263 Ocean, on disturbances in, 163–186 Origin, definition of, 9 — on the determination of, 187 — position of, deduced from direction of motion, 192 — — from destruction of buildings, 194 — — from rotation of bodies, 195 — — from time of occurrence, 199 — — examples of methods of calculating, 200–212 Oscillations, on earth, 344 Overturning moment, on the area of greatest, 53