Among the earlier of the modern forms of apparatus which came into practical adoption are the inventions of Dr Normandy and of Chaplin of Glasgow, the apparatus of Rocher of Nantes, and that patented by Gall& and Mazeline of Havre.
Beyond the Col de Tenda the direction is first roughly west, then north-west to the Rocher des Trois Eveques (939 0 ft.), just south of the Mont Enchastraye (9695 ft.), several peaks of about 10,000 ft.
From the Rocher des Trois Eveques the watershed runs due north for a long distance, though of the two loftiest peaks of this region one, the Aiguille de Chambeyron (11,155 ft.), is just to the west, and the other, the Monte Viso (12,609 ft.), is just to the east of the watershed.
The Yellow-knife, Hoarfrost, Lockhart (discharging the waters of Aylmer, ClintonColden and Artillery Lakes), Tchzudezeth, Du Rocher, Hay (400 m.
At the northern extremity of the town a precipitous rock, the Rocher des Doms, rises from the river's edge and forms a plateau stretching southwards nearly to the Place de l'Hotel de Ville.