EFFECTS OF DECOMPOSITION. 26? 



already described*, Saussure observed rocks of 

 grey marble, and fragments of slate. 



Such are some of the most remarkable exam- Rosenberg, 

 pies of this phenomenon. In 1806, the moun- 

 tain of Rosberg, or Rosenberg, near the town of 

 Arth, fell down, and buried a considerable tract 

 of country, with some inhabitants. A detailed 

 account of this event was published at Paris, 

 with three plates, representing, 1. the town of 

 Arth, the neighbouring country, and the profile 

 of the ruin ; 9. the same scene in front, with the 

 extent of the fall; 3. the lake and tower of 

 Lawerts, with Roggiberg and Rosenbergf, 



* Dom. II. Mode xiv. 



f Dernier -e relation du triste de'sastre, canst par Veloulement d'une 

 par tie du Roggilerg, et du Roslerg-, de trente pages d'etendue, 

 accompagnee de trois gravures, proprement termintes en noir, de 10 

 pouces de haut, sur 15 de large. Chez Villequin, march, d'estampes, 

 grande cour du Trilunat, No. 20. Qfr. 



La premiere represente le beau lourg d'Arth, les campagnes qui 

 ravoisinent, et le profit du I 'eboulement : La seconde, V immense 

 catafalque t et triste tomleau, d*une partie des halitans, de la vallte 

 (PArth, et I eboulement vu deface. La troisieme, le lac et la tour de 

 Lawerts, le Roggilerg, et le Roslerg. 



