251 EARTHQUAKES. [LeSSOU XXXV. 



heap extended lengthwise about 30 yards, rising 

 between two or three feet above the usual level. 

 After this, the ridge heeled or vibrated towards the 

 north side of the canal with great force, and flowed 

 above eight feet over the grass walk on that side. 

 On its return back into the canal, it again ridged in 

 the middle, and then heeled with yet greater force 

 to the souih side, and flowed over its grass walk. 

 During this latter motion, the bottom on the north 

 side was left dry for several feet. This appearance 

 lasted for about a quarter of an hour, after which 

 the water became smooth and quiet as before. 

 During the whole time, the sand at the bottom was 

 thrown up and mixed with water; and there was 

 a continual noise like that of water turning a mill. 

 At Cobham in Surrey, Dunslall in Suffolk, Earsy 

 Court in Berkshire, Eatonbridge in Kent, and m any 

 other places, the waters were variously agitated. 



At Eyam-bridge, Derbyshire (in the Peak), the 

 overseer of the lead mines sittins; in his writing- 

 room about 1 1 o'clock, felt a sudden shock, which 

 very sensibly raised him up in his chair, and caused 

 several pieces of plaisier io drop from the sides of 

 the room. The roof was so violently shaken, that 

 he imagined the engine shaft had been falling in. 

 Upon this he immediately ran to see what was the 

 matter, but found every thing in perfect safety. 

 At this time two miners were employed in carting, 

 or drawing along the drifts of the mines, the ore 

 and other materials to be raised up at the shafts. 

 The drift in which they were working was about 

 120 yards deep, and the space from one end to the ' 



other 



