332 EAETHQUAKES. 



thrown over the sides of tubs, and it is expressly mentioned 

 that no motion was perceived in the ground. 



At the Hague a tallow chandler was surprised at the 

 clashing noise made by his candles, and this the more so 

 because no motion was felt underfoot. 



Unusual disturbances in bodies of water, — At the 

 time of large earthquakes it would appear that earth 

 pulsations are produced, w^hich exhibit themselves in 

 countries where the actual shaking of the earthquake is 

 not felt, by disturbances in bodies of waters like lakes and 

 seas. 



Some remarkable examples of these disturbances are 

 to be found in the records of the great Lisbon earthquake. 

 This earthquake, as a violent movement of the ground, 

 was chiefly felt in Spain, Portugal, northern Italy, the 

 south of France and Grermany, northern Africa, Madeira, 

 and other Atlantic islands. In other countries further 

 distant, as, for instance, Great Britain, Holland, Scandi- 

 navia, and North America, although the records are 

 numerous, the only phenomena which were particularly 

 observed was the slow oscillations of the waters in lakes, 

 ponds, canals, &c. In some instances the observers 

 especially remark that there was no motion in the 

 soil. 



Pebley Dam, in Derbyshire, which is a large body of 

 water covering some thirty acres, commenced to oscillate 

 from the south. A canal near Grodalming flowed eight 

 feet over the walk on the north side. 



Coniston Water, in Cumberland, which is about five 

 miles long, oscillated for about five minutes, rising a yard 

 up its shores. Near Durham a pond, forty yards long 

 and ten broad, rose and fell about one foot for six or seven 

 minutes. There were four or five ebbs and flows per 

 minute. 



