Fig. 14 (a). — The Rata ravine at Ubaye (Basses- Alpes) after the reclamation work 

 was finished. (French official photograph.) 



(b). — A mountain village in the Pyrenees menaced by erosion. (French official 

 photograph.) 



(c). — Preventing further erosion by larch plantations in Ubaye area (Basses- 

 Alpes). (French official photograph.) 



166 



