n 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