[ 31 J been able io iell us about the real nature of this heat. to It has been rovoaled to me that this heat which causes such a tremendous effect on the solids, liquids, vapours and gases inside the earth's surface is caused by electrical energy and that electrical energy is the root-cause of earthquakes. Before proceeding further, if would be interesling lo quole ihe opinion of Sir Archibald Geikie. F. R. S. from his book on Geology :— "It has been ascertained that the ground bencath ()Ալ՝ feel is apparently everywhere subject to continual slight remors and io minule pulsations of longer duration....... Rapid changes of temperaiure and atmospheric pressure, lhe fall of a shower of rain, the patter of birds' feel, and slill more the iroad of larger animals, produce remors of the ground which ihough exceedingly Inirhute are capable of being made cloarly audible by IThՅՇlrՈՋ of the microphone and visible by TՈCՅrՈՏ of ihe galvanomeler....... Earth-quakes originaling under the sea are belived to be more numerous than those on the land....... Though iho phenomena of an earthquake become intelligible as the results of the transmission of the waves of shock arising from a centre where some sudden and violent impulse has been given within the lerreshial crust,
