214. THE OCEAN. 



passed the culminating line of the plateau of the Lancles. Researches 

 undertaken in other places would have doubtless confirmed the ob- 

 servations made by Bremontier ; but in the absence of these, we can- 

 not accept measures taken at the foot of a group of isolated dunes as 

 applying to the host of sands from Bayonne to the Point de Grave. 

 In order to pronounce definitely, we must wait for observations which 

 will not fail to be made one day, on the advance of the dunes in all 

 those parts of the globe where these hillocks have not yet been 

 arrested. 



