Earthquakes and Volcanoes

Excerpt from Earthquakes and Volcanoes: Their History, Phenomena and Probable Causes

Earthquake phenomena - The earth-wave - Difi'erent rates of propagation Direction of shock - The twisting effect - Extent of undulations - Speed of the earth-wave - The great sea-wave - Duration of shock - Formation of fissures Emanations from them Reading of mountains - Landslips Ingulfings - Subsidences and elevations - Effects on buildings and trees Extent of surface agitated - Spots exempt from shocks - Underground noises - Atmospheric phenomena - Electricity - Magnetism - Effects on men and animals - Seasons of earthquakes - Their relation to the moon's motions Local distribution of Earthquakes - Countries most exempt - Countries most afl'ected, .

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