. , ( 589 ) 
and near ‘Vrfelen, another from a mountainous Lake 
in Oberalp. Near Fluelcn , not far from Ury, it en- 
ters the IV. IValdjletten Sea , Lactts quatuor Givi* 
tatum Sylvejlrium , but refumes its Courfe and Name 
at Lucern, and at lad falls into the Aar below JVin- 
dijb , Vindonijfa, 
1 he Aar , Arola , Arula , arifes upon the high Moun- 
tain Grimfula , in the upper Vallefia. About three 
Hours below that, it falls into the Lake of Brientz , 
and out of that, not far from the Monadery Inter la- 
then , into the Lake of Thun , which it leaves near the 
Town of Thun , and thence running by Bern , Solo - 
thurn , and fo down, falls at lad, after many Windings 
and Turnings into the Rhine near Coblent z, Conjluen- 
tia , probably fo called from the uniting of thele two 
condderable Rivers. But to proceed. 
Gemmius Mons , the Gemmi , is a very high and 
deep Mountain in ^ allefia^ over which there is a Paf- 
fage, but only in Summer-time, from the Frutttnger 
V illey^ in the Canton of Bern , to the Mineral Waters 
at Leiik in V dlefia. The Defcent, on the South-fide 
of this Mountain, is deep and frightful, even to the 
Afped, beyond what can be imagined, being a narrow 
Path, cut on the Side ofalmod perpendicular Precipices, 
fometimes with trembling woodenBridges,or Planks over 
the Clefts in the Mountain, and here and there fupported 
with low Walls. Having been geometrically raeafu- 
red, it was found of 101 10 Feet in Length, or rather 
Height, its many Windings and Turnings included. 
At a fmall Cottage, called Zur T)auben , a poor reding 
Place for weary Travellers, being the highed Part of 
the Mountain which is paflable, the Mercury fub- 
fided July 1, 1709, to 21" 3"' which gives the Height 
of 
