VI. Observations on the Physical Structure of Devonshire and 

 Cornwall. 



By J. F. BERGrR, M. D. of Geneva, 



Honorary Memher of the Geological Soeieti/^ 



[Translated from the original French Manuscript.] 



IN venturing to lay before the Geological Society the followlng^ 

 observations made in the course of a journey through Devonshire 

 and Cornwall,* I do not presume to think that I have by any means 

 comprehended all that is interesting in the physical structure of 

 these counties ; many observations, not only of detail, but of higher 

 importance, have no doubt escaped me : all I pretend to do is, to 

 give a general outline of what I have seen, and to connect those 

 observations with such as I have made in the other countries of 

 Europe which I have also visited. 



Among the several formations f w^hich the greater part of 

 geologists recognize, (understanding by this term not only the 



* I had the pleasure of mating this tour in 1809, in company Mith Mr. Louis Albert 

 Necker of Geneva, who has since presented to the Geological Society, of which he 

 is an honorary member, a series of specimens, with a descriptive catalogue of the rocks 

 he had collected. 



t The word formation implies the idea of (iine or ejioch.. 



