natural power

"This huge lump of rock, in consequence of some singular concussion, or process, one of those magnetic phenomena which have so often shaken the terrestrial crust, has in some unexpected way closed up the passage. Many and many years have passed away since the ...

But if this awful noise proceeds from a cataract--if, so to speak in plain English, this vast interior ocean is precipitated into a lower basin--if these tremendous roars are produced by the noise of falling waters, the current would increase in activity, and ...