LEVELS OF rKAKCE. 



Second chain. 



Third chain. 



Fourth chain. 



Fifth. 



Sixth, or lowest 

 thain. 



Wilts continue diminishing to the Rhine ; but to the Lebre* 

 berg, five leagues below Soleure, or through a. space of 25 

 or 30 leagues, they decrease almost imperceptibly, as does 

 their base. In this interval indeed the summit of the Chas- 

 serale is not above 40 toises lower than the four highest ; 

 but from the Lebreberg to the Rhine the declivity is more 

 rapid. 



The plains or table-lands, that form the western foot of 

 this first chain of the Jura, likewise diminish in height pro- 

 portionally to the mountains, and in the same direction. 



2. The highest summits of the second chain of the Jura 

 continue nearly on a level with each other as far as the 

 Stierberg, opposite the Lebreberg, a distance of 20 or 

 25 leagues: but thence to the Rhine they also lower more 

 rapidly, like those of the first chain. 



3. The highest summits of the third chain are nearly on 

 a level with each other throughout its whole length, which 

 is 30 or 35 leagues. 



4. The highest summits of the fourth chain, which are 

 nearly in a right line from Estival, four leagues north of 

 Moirans, to St. Hippolytus, a distance of 20 or 25 leagues, 

 are likewise nearly on a level ; but those to the south of 

 Estival, and to the west of the above line, follow the in- 

 clination of the rivers. 



There are several large plains that intersect this chain, 

 particularly above Ornans and Villafans. These plains are 

 nearly level throughout. 



5. The fifth chain is very simitar to the fourth. 



6. The lowest chain of the Jura is about 60 leagues in 

 length. Its loftiest summit is that called the haut des Tron. 

 chatsy three leagues east of Porentrui. From this point 

 the other summits diminish on both sides, according to the 

 course of the rivers. There is no great difference from the 

 mountain of St. Ursane to the Mont deTrieve, two leagues 

 north-east of Reaume : they afterward diminish more, and 

 remain on a level with each other to the mountain of 

 Pcuillat, three leagues north-east of Bourg-en-Rresse, thafc 

 is for 35 or 40 leagues. 



The plains at the eastern foot of the last summits are 

 also nearly on a level with each other, particularly from 

 Qrgeiet to Cernans, above Salins. 



From 



