128 EARTHQUAKES IN THE EIGHTEENTH CENTUEY, [Ch. XXIX. 



A small circular pond of similar character was formed not 

 far from Polistena (see fig. 117); and in tlie vicinity of 

 Seminara^ a lake was suddenly caused by the openin^^ of a 

 great chasm^ from the bottom of which water issued. This 



Eig. 116. 



Section of one of the circular hollows formed in the plain of Eosarno. 



lake was called Lago del Tolfilo. It extended 1^785 feet in 

 length, by 937 in breadth, and 52 in depth. The inhabitants, 

 dreading the miasma of this stagnant pool, endeavoured, at 



Fig. 117. 



Circular pond near Polistena in Calabria, caused by the earthquake in 17S3. 



great cost, to drain it by canals, but without success, as it 

 was fed by springs issuing from the bottom of the deep 

 chasm. 



Cones of sand thrown ttp. — Many of the appearances 



ex- 



hibited in the alluvial plains, such as springs spouting up 

 their water like fountains at the moment of the shock, have 

 been supposed to indicate the alternate rising and sinking of 





* 



Pi 



