The most considerable of them are—the Roja, which rises in the Col di Tenda and descends to Ventimiglia; the Taggia, between San Remo and Oneglia; and the Centa, which enters the sea at Albenga.
The northern frontier is crossed by the railway from Turin to Ventimiglia by the Col di Tenda, the Mont Cenis line from Turin to Modane (the tunnel is 7 m.
Cuneo lies on the railway from Turin to Ventimiglia, which farther on passes under the Col di Tenda (tunnel 5 m.
In 1793 he distinguished himself by the brilliant defence of a redoubt at the Col di Tenda, with only thirty men against a battalion of the enemy.
Turin has, however, the advantage of being the nearest to the Mont Cenis, while the completion of the line through Cuneo over the Col di Tenda affords direct communication with the French Riviera.
To the west the limit will then be the Col de Tenda (6145 ft.), leading from Cuneo (Coni) to Ventimiglia, while on the east our line will be the route over the Radstadter Tauern (5702 ft.) and the Katschberg (5384 ft.) from Salzburg to Villach in Carinthia, and thence by Klagenfurt to Marburg and so past Laibach in Carniola on to Trieste; from Villach the direct route to Trieste would be over the Predil Pass (3813 ft.) or the Pontebba or Saifnitz Pass (2615 ft.), more to the west, but in either case this would exclude the Terglou (9400 ft.), the highest summit of the entire South-Eastern Alps, as well as its lower neighbours.
But what properly forms the western bit of the Alps runs, from near Turin to the Col de Tenda, in a southerly direction, then bending eastwards to the Col d'Altare that divides it from the Apennines.
Starting from the Col d'Altare or di Cadibona (west of Savona), the main chain extends first south-west, then north-west to the Col de Tenda, though nowhere rising much beyond the zone of coniferous trees.
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.
The Semmering, the Brenner, the Tenda and the Arlberg) can boast of carriage roads constructed before 1800, while those over the Umbrail and the Great St Bernard were not completed till the early years of the 10th century.
Still more recently the main alpine chain has been subjected to the further indignity of having railway lines carried over it or through it-the Brenner and the Pontebba lines being cases of the former, and the Col de Tenda, the Mont Cenis (though the tunnel is really 17 m.
Our selected divisions relate only to the High Alps between the Col de Tenda and the route over the Radstddter Tauern, while in each of the 18 subdivisions the less elevated outlying peaks are regarded as appendages of the higher group within the topographical limits of which they rise.
As regards the main divisions, three are generally distinguished; the Western Alps (chiefly French and Italian, with a small bit of the Swiss Valais) being held to extend from the Col de Tenda to the Simplon Pass, the Central Alps (all but wholly Swiss and Italian) thence to the Reschen Scheideck Pass, and the Eastern Alps (wholly Austrian and Italian, save the small Bavarian bit at the north-west angle) thence to the Radstadter Tauern route, with a bend outwards towards the south-east, as explained under (2) in order to include the higher summits of the SouthEastern Alps.
Maritime Alps (from the Col de Tenda to the Col de l'Argentiere).
8,531 Coll dell' Agnel (Tenda to Valdieri), foot path.
7,858 Col de la Cayolle (Var Valley to Barcelonnette), carriage road 7,717 Col di Santa Anna (Tinee Valley to Vinadio), bridle path 7,605 Col del Sabbione (Tenda to Valdieri), bridle path 7,428 Col d'Allos or de Valgelaye (Verdon Valley to Barcelonnette), carriage road.
6,545 Col de Tenda (Tenda to Cuneo), carriage road, railway beneath.
The gain of the Milanese in 18J9 by the future king of Italy (1861) meant that Italy then won the valley of Livigno (between the Upper Engadine and Bormio), which is the only important bit it holds on the nonItalian slope of the Alps, besides the county of Tenda (obtained in 1575, and not lost in 1860), with the heads of certain glens in the Maritime Alps, reserved in 1860 for reasons connected with hunting.
The duke rounded off his dominions by the purchase of Tenda and Oneglia, which increased his seaboard, and the last years of his life were spent in fruitless negotiations to obtain Monferrato, held by the Gonzagas under Spanish protection, and Saluzzo, which was a French fief.
The result is that the Italians are now unable to build a railway from Cuneo by the Col de Tenda and down the Roja valley direct to Ventimiglia.