■nsjj», — ":" ' y - ■'jafci — "^ 



T 



S 





Plate ii. — Aeolian s^and-ripples at Soutlibourne, in wiiich the sand 

 grains have been much sorted. 



Plate ii.— Aeolian sand-ripples at Ismailia to leeward ot a sand-dune 

 where there is an upward current of air. 



85 



