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HUTTONIAN THEORY 



445 



on 



that account, to found any argument on 



them. 



391. If we proceed farther to the north, to the 



fhores of the Baltic for inftance, we have un- 

 doubted evidence of a change of level in the 

 fame diredion as on our own fhores. The le- 

 vel of this fea has been reprefented as lowering 

 at fo great a rate as 40 inches in a century. 

 Celfius obferved, that feveral rocks which are 

 now above water, were not long ago funken 

 rocks, and dangerous to navigators ; and he par- 

 ticularly took notice of one, which, in the year 

 1680, was on the furface of the water, and in 

 the year 1731 was 20^ Swedifh inches above it. 

 From an infcription near Afpo, in the lake Me- 

 lar, which communicates with the Baltic, en- 

 graved, as is fuppofed, about five centuries ago, 

 the level of the fea appears to have funk in that 

 time no lefs than 13 Swedifh feet ^. All thefe 

 fads, with 



to enumerate, make the gradual depreffion, not 

 only of the Baltic, but of the whole northern 



ocean, a matter of certainty^ 



392. Suppoiing thefe changes of level between 

 the fea and land to be lufficiently afcertained, the 



many more which it is unnecefTary 



r.^ 



fuppoiition which at firft occurs is, that the mo- 



tion 



* Frifii Opera, torn. iii. p. 274 



