Chapter 10

Lagrange, 186 Language, origin of, 12 Laplace, 186 Laurentian rocks, 148 Law of tides, 15 Lazarus and Dives, 161 Leakage of heat, 86 Length of day increasing, 68 Leverrier discovers Neptune, 186 London, tides at, 23, 27 Lunar and solar tides compared, 15 Lunar diurnal tide, 34 Luni-tidal interval, 30 Lyell, 12

Macassar, explosion of Krakatoa heard at, 83 Machine for analyzing tides, 35 Machine for predicting tides, 35 Machine for observing tides, 32 Malahide estuary, 152 Mars, moons of, 142 Mass of moon found from tides, 16 Max Müller, 12 Maximum and minimum, 104 Mediterranean, tides in, 38 Meridian position of moon at high water, 26 Mills, tidal, 43 Mines, heat in, 86 Moment of momentum, how estimated, 170 Month equals day, 122 Month of 1400 hours, 122 Month with greatest number of days, 118 Moon and tides connected, 13 Moon, constant face of, 136 Moon-energy, 54 Moon, volcanic activity on, 94 Moons of Mars, 142 Motion, perpetual, 48

Nautical almanac, 26 Neap tides, 16 Needles, tides at, 23 Niagara, utilization of, 47 Noise from Krakatoa, 83 Numerical data of tidal evolution, 127

Obliquity of ecliptic and tides, 184 Observations of tides, 29 Ocean tides, 38 Orbit of earth, changes in, 72 Orbit of moon explained by tides, 184 Origin of moon, 100 Oscillations of water, 98

Pacific, 84 Paradox of geometric series, 92 Pendulum, motion of, 49 Periodic phenomena, 71 Periods of rotation and revolution of moon equal, 43 Periods of tides, 34 Perpetual motion, 48 Planets and tides, 155 Precession of equinoxes, 72 Prediction of tides, 35 Principal tides, 33 Punching-engine, 55 Purser, Professor, 61

Railway brakes, 68 Reaction and action, 69 Relative rotation, 104 Relative tides on earth and moon, 131 Reptiles, fossil, 11 Retreat of moon explained, 69 Retrospect of moon's history, 77 Rhine, mills on, 43 Ring theory of moon's origin, 96 Rivers, 149 Rocks, formation of, 150 Rodriguez, Krakatoa heard at, 83 Rolling mills, 56 Rotation of moon on its axis, 133 Rupture of earth, 76 Rupture of grindstone, 75

St. Helena, tides at, 38 Santa Cruz, 24 Satellites of Jupiter, 135 Saturn, 141 Seasons, 72 Seas, so called, on moon, 129 Secondary ages, 11 Sligo, tides at, 23 Small tides, 38 Smelting of iron, 87 Solar and lunar tides compared, 15 Solar system, 155 Solar tides, 14 Solar tides, ultimate importance of, 139 Sounds from Krakatoa, 83 Source of tidal energy, 67 Spring tides, 16 Stability, dynamical, 110 Stable equilibrium, 108 Stages of special importance, 117 Stalactites, 73 Steam engine and tides compared, 45 Strata, formation of, aided by tides, 154 Sumatra, 82 Sun, rotation of, 134 Sunbeams stored, 11 Sunda, 82 Sunsets, Krakatoa, 85

Table of luni-tidal corrections, 30 Telescope at Washington, 143 Temperature of space, 91 Tertiary ages, 11 Thames, tides in, 125 Thomson, Sir W., 36, 44 Tidal currents used in making rocks, 153 Tidal efficiency, how estimated, 14 Tidal evolution, to whom due, 97 Tide gauge, 31 Tide mills, 44 Tide predicting engine, 36 Tides and geology, 144 Tides at London bridge, 28 Tides, change and full, 22 Tides, commercial value of, 47 Tides, due to moon, 13 Tides, how to observe, 29 Tides in Jupiter, 138 Tides in moon, 128 Tides, small, 38 Tides, solar and lunar compared, 15 Tides varying inversely as cube of distance, 15 Time and tide, 12 Timor, Krakatoa heard at, 83 Tralee, tides at, 23 Tyndall, 73 Tynemouth, 23

Undulations of a fluid globe, 99 Undulations of air from Krakatoa, 82 Unintermitting phenomena, 71 Unstable equilibrium, 108 Uranus, 142

Vast tides, 39 Volcanoes, 80 Voyage of Krakatoa dust, 84

Washington reflector, 142 Water absent from moon, 129 Water-wheels under London bridge, 43 Waves of air from Krakatoa, 82 Whewell on tides, 30 Work done by tides, 42, 47 Work of tides, 42

Yarmouth, tides at, 23

THE END.

_Richard Clay & Sons, Limited, London & Bungay._