VOL. XXXV.] PHILOSOPHICAL TRANSACTIONS. 289 



Fedretto, on a mountain of this name. It descends the Lavinia Vallis, or 

 Liviner Valley, and in its way to the lake of Locarno, receives many brooks 

 and rivulets from the adjoining mountains : it unites its waters with the Po, 

 near Pavia, and loses itself jointly with that river in the Adriatic gulf. 



The Rhine, Rhenus, by Caesar, (de Bello Gallico) termed latissimus atcjue 

 altissimus, arises in three several branches, which are called Rhenus anterior, 

 posterior, et medius, the further, the hinder, and middle Rhine. The hinder 

 Rhine takes its rise on the high mountain Avicula, Colmen del Occello, part 

 of the Adula, in the alp San Porta, from a Gletcher, or ice-mountain, which 

 extends in length full 2 hours. The middle Rhine, Rhenus medius, arises on 

 the Luckmannier Berg, which is also part of the Adula, in the upper part of a 

 valley called San Maria, opposite to one of the sources of the Thesin. The 

 furthermost Rhine, Rhenus anterior, arises on that branch of the Crispalt, 

 which is called Cima del Badut, Badilz, and soon receives several lateral 

 branches from the Alps Mugels and Cornera. Near the monastery of Disentis, 

 the further and middle Rhine join together, and the united stream falls into the 

 hinder Rhine, near Reichenau. Below Rheineck, the Rhine falls into the 

 Lacus Bodamicus, or Boden sea, and comes out of it near Stein; whence 

 washing the borders of Swisserland, it then traverses great part of Germany in 

 a very irregular course, till at last, in Holland, it loses itself in the great 

 ocean. 



The Reiiss, Rusa, arises from a small lake called Lago di Luzendro, on the 

 S. Gothard, but soon receives a considerable inforcement from the Furca, and 

 near Urselen, another from a mountainous lake in Oberalp. Near Fluelen, 

 not far from Ury, it enters the Four Waldstetten sea, Lacus quatuor Civitatuni 

 Sylvestrium, but resumes its course and name at Lucern, and at last falls into 

 the Aar below Windish, Vindonissa. 



The Aar, Arola, Arula, arises on the high mountain Grimsula, in the Upper 

 Vallesia. About 3 hours below that, it falls into the lake of Brientz, and out 

 of that, not far from the monastery Interlachen, into the lake of Thun, which 

 it leaves near the town of Thun, and thence running by Bern, Solothurn, falls 

 at last, after many windings and turnings, into the Rhine near Coblentz, 

 Confluentia. 



Gemmius Mons, the Gemmi, is a very high and steep mountain in Vallesia, 

 over which there is a passage, but only in summer-time, from the Fruttinger 

 valley, in the canton of Bern, to the mineral waters at Leiik in Vallesia. The 

 descent, on the south side of this mountain, is steep and frightful beyond ima- 

 gination, being a narrow path, cut on the side of almost perpendicular preci- 

 pices, sometimes with trembling wooden bridges, or planks over the clefts in 



VOL, vii. p p 



