Sir C. Lyell on the Mineral Waters of Bath. 15 
during a great earthquake which, in 1660, threw down several 
houses in that town. 
It has been ascertained that the hot springs of the Pyrenees, 
the Alps, and many other regions, are situated in lines along 
which the rocks. have been rent, and usually where they have 
been displaced or “faulted.” Similar dislocations in the solid 
crust of the earth are generally supposed to have determined the 
spots where active and extinct volcanos have burst forth; for 
which acts as a solvent; yet Professor Ramsay has calculated 
that if the sulphates of lime and soda, and the chlorids of so- 
dium and magnesium, and the other mineral ingredients which 
they contain, were solidified, they would form in one year a 
