364 



A faithful Record of the Miraculous Case of Mary Jobson. By W. 



Raid Clanny, M.D., F.R.S.E.— ^y the Author. 

 Bien-Etre at Concorde des Classes du Peuple Franc^ais. Par Le 



Baron Charles Dupin. — By the Author. 

 Vie d'un Bianfaitaur du Peuple, A. P. de la Rochefoucauld. Par 



Le Baron Chai'les Dupin. — By the Author, 



Monday, 1th March. 



Sir T. M. BRISBANE, Bart, President, in the Chair. 



1. On the most recent Disturbance of the Crust of the Earth, 

 in respect to its suggesting a Hypothesis to account for 

 the Origin of Glaciers. By Sir George Mackenzie, Bart, 



In this paper the author pointed out that the force, which had 

 protruded granite and other matter among the strata, could not 

 have been the same in point of time with that which broke up the 

 crust of the earth into its present shape ; because the matter in veins 

 which we now see exposed to view on the faces of precipices, having 

 been fluid at the time of protrusion, must have run out of the fis- 

 sures on, the rock being raised up. It appeared, therefore, that all 

 matter tilling fissures in rocks, had become solid before the most re- 

 cent cataclysm had taken place. There being no appearance of any 

 matter having been protruded from below at the time of the surface 

 beino- forced into its present disrupted state, it was assumed that the 

 expanding force which broke the crust, was that of vapourable mat- 

 ter, chiefly steam, confined between the solid crust and the igneous 

 mass in the interior ; and also filling up the place of the enormous 

 masses of matter which had been, at a former period, forced up from 

 below, and which we now see in the shape of veins and dykes, and also 

 of those very extensive ranges of country wholly composed of trap 

 beds, admitted to have been submarine lavas. The vapourable mat- 

 ter having increased, and also its expansive force, the crust at length 

 yielded ; and the vapourable matter being set free, two consequences 

 were supposed to have followed. First, the vapourable matter must 

 have carried with it a vast amount of heat, so as to cause a consider- 

 able refrigeration of the broken crust, and to which its exposure to atmo- 

 spheric influences, and perhaps also to the rushing of the waters, would 

 contribute. Secondly, supposing the cataclysm to have taken place in 

 the winter season, the extraordinary quantity of vapour forced by 



