178 E. C. ANDREWS. 



destructive work, and to which the formation of the great 

 beach was due. New beach more than 170 feet wide. 



July 17th, 7 a.m. — Waves and tides much diminished. 

 Magnificent cusps formed on upper portion of beach. Width 

 apart from 45 to 50 paces. Deep parallel furrows in beach 

 inside cusps. Figures 2, 3, and 4, illustrate the general 

 appearance of Lady Robinson's Beach just before, during, 

 and just after, the storm. 



It was evident that this the greatest storm for many 

 years in this locality had piled up a high flattish beach so 

 as to form a bridge along which it could transport its load 

 as a whole with the minimum of work, (hence with the 

 minimum of friction), in its determination to demolish the 

 sand dunes. This implied also a regular profile to the beach. 

 It was also evident that such a bridge was not adjusted to 

 the strength of the diminishing waves, and that such 

 diminishing waves had attempted to form a beach of steeper 

 slope and less width than that of the storm, and that they 

 had commenced the work of beach degradation by the 

 formation or excavation of deep and wide cusps. 



July 17th, 5 p.m. — Low tide almost. Beach cut up into 

 fine cusps of successive widths 45, 40, 30, 45, 46 paces. 

 Signs of these cusps becoming smaller and being shifted 

 to the north along the beach and seawards of the earlier 

 cusps. Sets of deep parallel grooves formed inside cusps. 

 Waves in form of swell travelling N. to S. along the beach 

 with great velocity. 



July 18th — 31st.— Waves still decreasing in height. Nine 

 cusps formed in front of eight older forms. Later with 

 still decreasing swell a set of cusps formed in front of older 

 sets. Nine cusps in this lower and third set occupying 

 same width as the older and higher four. Fig. 8 illustrates 

 this association of cusps. At certain points such as beach 

 salients, no cusps formed, while in the associated beach 



