Lo P. Scrope on Craters, and the Liquidity of Lavas. 351 
f hundreds of miles, and spread in a thin layer oyer an enor- 
-Mous area of sea or land. And, moreover, the larger the dimen- 
Sions of any crater, the more powerful and enduring will have 
; been, in all probability, the explosions, and the more thoroughly 
; inturated, during the process of its gradual enlargement, would 
be the fragments thrown up by them. 
_ I remember being exceedingly surprised, after the termination 
of the Vesuvian eruption of 1822, forming a continual fountain 
of stones and ashes some miles in height, lasting through twenty 
ays, and in the end completely gutting the mountain, to find 
Iti 
tain, by the torrents 
vas), such as overw 
of rain (producing lave di 
elmed Herculaneum, and 
