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POPULAR SCIENCE REVIEW. 
know that subterranean heat exists to an enormous extent in 
the interior of the earth, and in former ages has melted and 
erupted masses of fluid rock, and caused subsidences and 
elevations here in England, and, in all probability, will do so 
again. Why seek for other and unknown causes ? The earth- 
quake of October last was harmless, but it was sufficiently 
violent in some localities to make us understand that the 
powers are not extinct, and that volcanic agency is not dead 
beneath us. A shock of only double the violence would pro- 
bably have caused some serious catastrophes in the neigh- 
bourhood of Ross and Abergavenny. The direction of this 
earthquake appears to have been from south-west to north- 
east. This is believed by Mr. Mallet to be the line of the 
Lisbon earthquake; and it was certainly the line of many earth- 
quake movements in former ages. During the earthquake at 
Lisbon, Loch Lomond rose two or three feet; women washing 
in the Tay were swept off their legs by a wave ; and a great 
wave rolled into Kinsale. In Carmarthen Bay, about eight 
hours after the earthquake of October, a large body of water, 
of a dark-brown colour, as if charged with earthy matter, was 
seen to roll forward in the shape of a cone, and coming in 
contact with a boat, “ the boat was violently pitched about, 
and the water thrown completely over it.” 
The roaring noise which accompanied the earthquake is 
supposed, by the editor of “The Geologist,” to have been 
“ fancied.” And the phenomena that occurred are treated so 
lightly, that it is manifest Londoners heard and felt very little 
in comparison with those who reside in the western counties. 
The evidence of the Rev. H. C. Key, of Stretton Rectory, near 
Hereford, with respect to the noise, which he likens to that of 
“a very heavy and long train rushing furiously through a 
station,” is precisely the evidence that I have received from 
several other persons who happened to be awake, and who 
never heard or read of Mr. Key^s experiences. 
As regards the undulatory motion of this earthquake, and 
the boat-like rocking which has been described by some 
persons, I may say that in four instances where I examined 
the position of their beds, I found that their broadsides lay 
east and west, or nearly so. In cases where the heads of the 
beds lay north or south, the swaying motion from side to side 
does not appear to have been experienced to a similar extent. 
The localities where the shock was felt most appear to have 
been along the line of certain rivers in the West of England 
which run along the track of ancient earth movements. The 
Golden Valley, in Herefordshire, along the banks of the Dore,was 
much shaken, as also were the valleys of the Wye, and certain 
tributaries of that river towards Monmouth and Abergavenny. 
