NOME VIII. KOLLANITE. 113 



brown and black pebbles, united in a silex of a 

 yellowish white. The pudding of Rennes, which 

 he subjoins, has been shown by Patrin to be 

 merely a spotted jasper. That of Chartres must 

 be also the same described by the acute Patrin, 

 as merely an oculated silex, a keralite, or horn- 

 stein of the Germans, 



The pudding-stone of England, therefore, re- 

 tains that singularity of composition, which has 

 diffused its name through all languages, and 

 been admitted in all works of mineralogy, in an 

 assumed contradistinction to bricia, which con- 

 sists of angular fragments. 



But the learned and sagacious Patrin is him- Common 



pudding-stone. 



self mistaken, when he says that the pudding- 

 stone is found in the rivers of Scotland. It is 

 true that a rough pudding-stone, composed of 

 rolled pebbles of granite, porphyry, clay-Mate, 

 quartz, trap, primitive limestone, and other ori- 

 ginal substances, in a cement generally ferrugi- 

 nous or argillaceous, accompanies, on both sides, 

 the Grampian chain of mountains, as it does 

 that of the Alps. It sometimes, as Faujas has 

 observed, even contains green porphyry, and 

 green trap, and thus approaches to the famous 

 universal bricia of Egypt. But these Scotish 

 rocks have only a slight resemblance to the pud- 



VOL. II. I 



