EARTHQUAKES AND VOLCANOES. 



twenty feet, and was moreover discoloured, having the blackness 

 of ink. 



33. During the earthquake the water retired from the harbour 

 at Lisbon, leaving the bar uncovered and dry, but it soon returned, 

 rushing in enormous volumes, so as to rise in some places to the 

 height of sixty feet. The shores were everywhere inundated, 

 and the seaport of St, Eubal's, about twenty miles south of Lisbon, 

 was submerged and totally disappeared. 



The records of these convulsions of the earth supply many 

 examples showing that the bottom of the sea has shared the per- 

 turbations of the land. In the case of the great earthquake 

 which desolated Peru, in 1746, the Pacific rushed upon the coast 

 with irresistible fury, destroyed several seaports, carrying the 

 vessels which floated in them to great distances up the country, 

 and submerging a large tract of land near Callao, so as to convert 

 it into a permanent bay. 



i(3G 



