MODE XIV. CALCAREOUS GLUTENITE. 529 



Grenoble; and inspection must verify whether the 

 pebbles have been rounded by friction, or the 

 whole be an original rock of a particular crystal- 

 lisation. 



Another marble, called a violet bricia by the 

 French, comes from Seix and other places in the 

 department of Arriege, which is particularly rich 

 in beautiful marbles. It is a coarse brown, spot- 

 ted with lilac and white. That of St. Romaine, in 

 the department of Cote d'Or, so styled from the 

 excellent wines of Burgundy, is of a brick red 

 with angular fragments of yellow. Doulers, in 

 the department of the North, presents a bricia of 

 many fragments, ash colour, white, and reddish. 

 That styled of the Pyrenees, is of a brownish red, 

 with black, grey, and red fragments, and has con- 

 siderable reputation. 



Of the common kind, Saussure has observed 

 the following examples : 



The mountain near Vevey is composed of coarse 

 pudding-stone, the rounded flints being united by 

 sand, and this sand by a calcareous gluten, which, 

 in the rents and intervals of the beds, assumes the 

 form of spar. 



The pudding-stone of which Mount Rigi is 

 composed, consists chiefly of red clay pebbles, so 

 soft as to be affected by rain water, and united by 

 a calcareous gluten. 



VOL. i. 2 M 



