452 ON THE GEOLOGY OF THE ENVIRONS OF NICE. 
As the formation of these gravel meee still continues & 
proceed before our eyes, it would form a very curious subject 
of speculation, if the progress of the n mounds which are evi- 
dently projecting by every river which pours itself into the | 
Mediterranean, could be ascertained. It would be curious to 
learn what period of ‘years was required to make any sensible 
difference on the soundings at the embouchure of the Var, and 
although much allowance would require to be made, still ac- 
curate observations of this sort would afford some data, by 
which the probable period requisite for the formant of the 
banks above might be computed. , 
APPEN- 
