Page:Book of the Riviera.djvu/260

204 form the terrace to the Maritime Alps, is at once absorbed, and descends through fissures to deep channels, where the accumulated water flows and breaks forth in what are locally called ƒoux, often in large volume, and feed the rivers. Sometimes the streams drop into pot-holes; these are called embues. The Siagne has its source in the Place de la Caille, an ancient lake bed, but sinks, and comes forth 1,500 feet below in the ƒoux of the Siagne. This river receives the Siagnole, which derives its water from a number of these springs that spout out of the rock. But in some cases the rain-water sinks to a level still lower, and then breaks forth in the sea itself.