VARIOUS TYPES OF BREAKWATERS. 



205 



experience showed to 

 be desirable. Sections 

 of this breakwater, 

 as constructed, will be 

 found in Figs. 42 and 

 43-45. 



The chief lessons to 

 be learnt from this 

 work some of which 

 have already been re- 

 ferred to are : 



(a) The injurious 

 effect upon the charac- 

 ter of waves, which is 

 produced by a mound 

 foreshore, situated as 

 that at Alderney is 

 in regard to the levels 

 of high and low water 

 (see pp. 25-31). Re- 

 ferring to this subject, 

 Sir John Coode re- 

 marked, " No doubt the 

 breakwater at Alder- 

 ney was exposed to a 

 tremendous sea, but 

 this was not wholly 

 due to the exposure of 

 the site. No one could 

 deny that the exposure 

 was great ; but the 

 very heavy sea against 

 the pier ivas mainly 

 due to the peculiar con- 

 figuration of the bank, 

 and to the profile of 

 the work itself. A 

 similar thing took place 

 at the old Eddystone 



1 Min. Proc. Intt. C.E., vol. 

 xxxvii. pi. iii. 



