SiGERSON — On the Physical Geography of Ireland. 13 



A. D. 1823. The waters of Lake Erie rose suddenly to the height 

 of nine feet on the Canadian shore, carrying men and boats inland with 

 irresistible force. The waters then fell but rose again twice to a height 

 of seven feet. It was reported that the shock of an earthquake had 

 been felt. 



In the fourth category I have placed the eruptions of streams and 

 rivers. The Irish Annals enumerate several such outbursts, which 

 all are included in the second and later group. 



A. M. 3503. The eruption of the seven Brosnas — now two, the 

 other seven being tributary streams ; of the nine E^ighes, in Leinster ; 

 and of the three Mnsionns, in Tirerril. 



A.M. 3510. The eruption of the Inny, in "Westmeath ; of the three 

 Socs ; the Suck and its afiluents, in Connaught ; and the Fregabail, 

 now Eavelwater, Antrim. 



A. M. 3520. Irial son of Heremon died. During his reign took 

 place the eruptions of the Suir, the Fell, the Ercere, in Munster ; the 

 three Finns in Ulster, and the three Corindes. 



A. M. 3656. The three black rivers of Ireland burst forth, the Una, 

 Tyrone ; Forann and Callan, Armagh. 



A.M. 3751. The monarch Fiacha died. It was in his reign the 

 springing of these rivers first took place, namely, the Fleasg, the 

 Mang, and the Labrann, in Kerry. 



A.M. 4169. The monarch Sirna died. In his reign of a century 

 and a haK, took place the eruptions of the rivers. Skirt, Doailt, in 

 Monaghan ; the I^fith (river of Ardee, Louth) ; the Laune, in Kerry ; 

 and the Slaine, a tributary of the Boyne. 



Parallel cases : A. D. 1797. Quito. The ground opened about Ttm- 

 guragua in enormous clefts, from which volumes of water and stinking 

 mud issued, forming lakes in many places, of considerable extent. 



A. D. 1802. The earth opened at Bucharest, and greenish water 

 was poured forth, diffusing an odour of sulphur through the whole city. 



A, D. 1804. At Badisen, Silesia, springs suddenly burst from the 

 mountain, and the Elbe and neighbouring rivers inundated their 

 banks. 



A. D. 1804. Spain. Near Albugnol the mountain was cleft, and 

 a stream was poured forth on the lower part of the town. Springs 

 disappeared and new ones appeared. 



A. D. 1809. Capetown. In Blanweberg's valley fissures appeared, 

 and muddy water was thrown up to a height of six feet through holes 

 in the sandy soil. 



A. D. 1812. At Caraecus, South America, an immense torrent of 

 water burst forth. 



A. D. 1828. Peru. At Surras, streams of water burst forth from 

 the earth. 



A. D, 1828. Caucasus. Three large springs bui'st forth, fissures 

 and other springs appeared. 



A. D. 1829. Spain. At Mm-cia, fissures opened, and from some 

 small holes sand was spirted out, from others water. 



