INTRODUCTION. XVII 



of dew. Many invalids feel an unpleasant chill then, which 

 may prove injurious to them. But soon after sunset the 

 thermometer begins to rise again and a gentle breeze blows 

 from the slowly cooling land to the sea, which maintains a 

 more even temperature. This current of air lasts till the next 

 morning unless there is a change of \veather. In winter and 

 early spring the difference in temperature between sun and 

 shade is so great that even strong people should beware of 

 chills and not go too lightly clad. Fogs are almost unknown 

 on the Riviera; the air is remarkably clear and, as a result, 

 the sky is of the deepest blue. Thus on this favoured shore 

 does Nature appear ever to wear her festal robes, and by 

 her radiance awaken in man the deepest feelings of joy 

 and hope. 



