THE " MISTEAL." 2G5 



summit of tlie mountains, to replace the ascending current of the ex- 

 panded atmosphere, which is formed above the region of the coast-line. 

 During the night, it is true, the low lands situated at the base of the 

 mountains lose their heat by radiation, and the afflux of cold air 

 diminishes, to recommence on the morrow, when the sun warms 

 the atmosphere of the plains anew. In summer, the difference of 

 temperature is less between the shores and the desert escarpments 

 of the Cevennes. The mistral is very feeble during this season, or 

 it even entirely ceases. In various parts of the coasts of Spain, Italy, 

 Greece, and Asia Minor, winds of the same kind, known under 

 other names, descend in the same manner from the summit of the 

 bordering mountains. 



