304 THE BEAUTIES OF NATURE CHAP. 
At present the waters of the Valais escape 
from the Lake of Geneva at the western end, . 
and through the remarkable defile of Fort de 
l’Ecluse and Malpertius, which has a depth of 
600 feet, and is at one place not more than 
14 feet across. Moreover, at various points 
round the Lake of Geneva, remains of lake 
terraces show that the water once stood at a 
level much higher than the present. One 
of these is rather more than 250 feet’ above 
the lake. 
A glance at the map will show that be- 
tween Lausanne and Yverdun there is a low 
tract of land, and the Venoge, which falls 
into the Lake of Geneva between Lausanne 
and Morges, runs within about half a mile of 
the Nozon, which falls into the Lake of Neu- 
chatel at Yverdun, the two being connected 
by the Canal d’Entreroches, and the height 
of the watershed being only 76 metres (250 
feet), corresponding with the above mentioned 
lake terrace. It is evident, therefore, that 
when the Lake of Geneva stood at the level of 
the 250 feet terrace the waters ran out, not as 
1 Favre, Rech. Geol. de la Savoie, 
