The principal affluents are the AriCge, the Tarn with the Aveyron and the Agout, the Lot and the Dordogne, which descends from Mont Dore-lesBains, and joins the Garonne at Bec-dAmbez, to form the Gironde.
There are important zinc works at Auby and St Amand (Nord) and Viviez (Aveyron) and Noyelles-Godault (Pas-de-Calais); there are lead works at the latter place, and others of greater irirportance at Couron (Loire-Infrieure).
Leather.Tanning and leather-dressing are widely spread industries, and the same may be said of the manufacture of boots and shoes, though these trades employ more hands in the department of Seine than elsewhere; in the manufacture of gloves Isre (Grenoble) and Aveyron (Millau) hold the first place amongst French departments.
Pop. (1906) 9749 It possesses iron mines and is the centre of the coal-fields of the Aveyron, which supply the ironworks established by the Duc Decazes, minister of Louis Xviii.
The waters of the northwestern slope of the southern Cevennes drain into the Tarn either directly or by way of the Aveyron, which rises in the outlying chain of the Levezou, and, in the extreme south, the Agout.