INDEX. 



Aberdeen, cost and other particulars 



of south pier, 219 



, damage to south pier, 182 



, early use of sloping blocks at, 



197 

 , large bags of concrete first used 



at, 189 



Advance of foreshores, 285 

 Advantages of using large blocks in 



breakwater construction, 179 

 Aeration of waves, 32 

 Air-slaking of Portland cement, impor- 

 tance of, 127, 128 

 Airy, Sir G. B., on tides, 44 



, on waves, 23 



Alderney breakwater, cost and other 



particulars, 216 

 , disturbance of rubble by 



waves, 201 

 , injurious eflect of " battered" 



face, 207, 208 



, mound, 30, 205 



, parapet, 208 



, method adopted in forming 



mound, 241 



, power of waves at, 84 



, sections of, 205, 206 



, settlement of, 207, 276 



Alexandria breakwater, 209, 210, 215, 



218 



Algiers breakwater, 209, 214 

 Algoa Bay, height of waves in, 37, 38 

 American rock elm, 137 

 Analysis and prediction of tides, 55, 56 

 Anchorage, good and bad, 148 

 Andrews, T., on corrosion of metals in 



sea-water, 139-141 

 Anemographs, 7 

 Anticyclones, 5, 14 



Appliances for block-setting, 254 

 Aprons, large bags of concrete suitable 



for, 188 

 , necessary to prevent scour, 196, 



270-272 

 Ardrossan harbour, early use of sloping 



blocks at, 197 

 Atlantic Ocean, height of waves in, 35, 



36 

 Atmospheric pressure, tides affected by, 



57,58 



Bag-work, 181, 188-193, 261 



, box used for depositing bags, 189 



, frame used for depositing bags, 191 



Baltic red-wood, 131, 134, 135 



, creosoted, useful for sea- 

 works, 134 



Bamber on Portland cement, 124-126 

 Bank, Dogger, waves break upon, 28 



of Newfoundland, waves break 



upon, 29 



, Kiy, waves break upon, 27 



Barges, 236, 245-249 



used for constructing mound of 



Alderney breakwater, 241 



depositing blocks pell-mell, 



248, 249 



depositing rubble, 245-247 



laying concrete-bags, 248 



Baring in quarries, 90 



Barletta eastern mole, 219 



Barometer, indications of, 15, 17, 19 



Bars, formation of, 150-152 



Batter in faces of piers objectionable, 



183, 207, 208 



Bay of Biscay, height of waves in, 36 

 Beaches, wave-action on, 41, 71, 284 

 Beaching-ground, 147 



U 



