298 



INDEX. 



Tidal harbours, 60 



harmonic analyzer, 55 



range, 51-54 



affects cost of breakwaters, 



58-60 

 , work within, 258-261 



wave affected by distribution of 



land, etc., 47 



, progress of, 50, 51 



Tides, 44-62 



affected by variations in distance 



of sun, moon, and earth from each 

 other, also by declination, 48 



, analysis of, 55, 56 



, benefits derived from, 60, 61 



, difference of range in summer and 



winter, 49 



, diurnal and semi-diurnal, 49 



, double, 53, 54 



, effect of atmospheric pressure upon, 



57,58 



, effect of wind upon, 56, 57 



, equinoctial spring, 49 



, neap, 46, 52 



, normal rise of, in open ocean, 52 



, prediction of, 55, 56 



, priming and lagging of, 48 



, range of, 51-54 



, , affects cost of breakwaters, 



58-60 



, spring, 46, 52 



, theory of, 45 



Timber, 131-138 



, destruction of, by sea-worms, etc., 



132-138 

 , different kinds used in sea-works, 



131 



, protection of, 134 

 "Titans," or setting-machines, at Co- 

 lombo, Kurrachee, and Mormugao, 194 

 , , various types described, 250- 



253 

 , , weight of, causes settlement 



in work, 181 

 Translation, waves of, 25, 26, 29. See 



also Waves 



V 



Value of fishing boats and gear, 171 



herring fisheries, 169, 170 



Various methods of constructing break- 

 waters, 236-256 



Velocity of littoral currents accelerated 

 by piers projected across them, 70, 71 



waves, 32, 33 



wind, relation of, to pressure, 7-12 



Vernon-Harcourt, description of Aldcr- 

 ney breakwater, 30, 276 



w 



"Water, circulation of, in Mediterranean, 

 67 



, depth of, affects waves, 25, 29 



, destructive effect of falling, 80-82, 



178 



, quantity of, used in mixing con- 

 crete, 115, 116 



Wave-breaker, 193 



at Mormugao, 195, 196 



at Ymuiden, 271 



proposed for Alderney break- 

 water, 208 



Waves, 23-43 



, action of, against vertical face, 173, 



174 



, , on beaches, 41, 71, 284 



, aeration of, 32 



assist in forming bars at mouths of 



rivers, 152 



breaking, 26, 30 



caused by earthquakes, 33 



, character of, affected by depth of 

 water, 25, 29, 205 



, crests of, how formed, 31 



, depth of disturbance caused by, 



28, 29, 201, 202 



, direction of, influenced by con- 

 tours of sea-bed, 74 



, experiments on, 23, 24 



, forced, 33 



, force of (see also Power of waves), 



26, 40, 41, 78-86 



, free, 33 



, generation of, 1 



, ground-swell, 33, 34 



, height of, 12, 34-39, 71, 72, 74 



, impact of, 26, 40, 41 



injuriously affected by breakwater 



mounds, 29, 205 



, length of, 26-29, 32, 33 



, motion of, 24 



, movement of particles in, 23-28 



of oscillation, 23-28 



of translation, 26, 29 



