INDEX 



Aeolian sand-ripples — 



Always present on the waves, 75 



Experimental reproduction of, 88 



Measurements of, 81 



Rate of advance, 82 



Sorting of grains during rippling, 83 

 Aeolian sand-waves — 



Angles of weather and lee slopes, 35 



Height and length of, 37, 38 



Mode of origin, 54, 58 



Peaks and saddles on the ridges, 58 



Rate of advance, 54 

 Ayrton, Mrs. H. on ripple- mark, 258 note 



Blunt, W. S., 49 

 Barchan, 50, 52, 53 



Barmouth, sub-aqueous sand-waves at, 292 

 Bournemouth, observations in neighbourhood of, 79, 262, 266, 

 346, 364 



" Cahots," or undulations produced by sledges, 227 et seq. 



Experiments with model sledge, 236 et seq. 

 Carus-Wilson, C, 355 

 Cattle, treading of, produces tranverse furrows, 253 



379 



