BULLETIN OF THE NATIONAL RESEARCH COUNCIL -- FOREWORD -- Contents -- TIDES, OCEAN, AND EARTH -- CHAPTER I INTRODUCTION -- REFERENCES -- CHAPTER II TIDAL THEORY -- REFERENCES -- CHAPTER III TIDAL COMPUTATIONS AND PREDICTIONS -- TREATMENT OF TIDE RECORDS -- PREDICTION OF TIDES -- REFERENCES -- CHAPTER IV MEAN SEA-LEVEL -- VARIATIONS IN SEA-LEVEL -- CAUSES OF VARIATION -- THE DETERMINATION OF MEAN SEA-LEVEL -- THE MEAN SEA-LEVEL SURFACE -- REFERENCES -- CHAPTER V EARTH TIDES -- REFERENCES -- CHAPTER VI TIDAL FRICTION -- NOTATION -- REFERENCES -- GRAVITY, DEFLECTION OF THE VERTICAL, AND ISOSTASY -- CHAPTER VII ISOSTASY -- GLOSSARY -- REFERENCES -- CHAPTER VIII THE INFLUENCE OF ISOSTASY ON GEOLOGICAL THOUGHT -- REFERENCES -- CHAPTER IX THE SHAPE AND SIZE OF THE EARTH -- DETERMINATIONS OF THE FIGURE OF THE EARTH BY OBSERVATIONS OF GRAVITY -- LUNAR METHODS OF DETERMINING THE FLATTENING OF THE EARTH -- REFERENCES -- CHAPTER X DETERMINATION OF "g" BY MEANS OF THE FREE SWINGING PENDULUM -- INTRODUCTION -- ABSOLUTE DETERMINATIONS OF GRAVITY -- RELATIVE DETERMINATIONS OF GRAVITY -- MODERN GRAVITY APPARATUS -- PENDULUM APPARATUS OF THE COAST AND GEODETIC SURVEY -- GRAVITY DETERMINATIONS -- COINCIDENCE OBSERVATIONS -- OTHER OBSERVATIONS -- VON STERNECK PENDULUM APPARATUS -- GRAVITY DETERMINATIONS AT SEA WITH PENDULUM APPARATUS -- SUGGESTIONS FOR ADDITIONAL READING -- CHAPTER XI GRAVITY MEASUREMENTS WITH THE EÖTVÖS TORSION BALANCE -- CALCULATION OF THE CURVATURE AND GRADIENT -- UNITS OF MEASUREMENT -- VARIATION OF GRAVITY -- REFERENCES -- CHAPTER XII GEODETIC INSTRUMENTS -- INTRODUCTION -- ASTRONOMICAL INSTRUMENTS -- TRIANGULATION INSTRUMENTS -- LEVEL AND ROD -- SUGGESTIONS FOR ADDITIONAL READING -- CHAPTER XIII ON SOME OF THE GREATER PROBLEMS OF PHYSICAL GEOLOGY -- CHAPTER XIV THE DETERMINATION OF ELEVATIONS -- METHOD -- CLASSIFICATION OF LEVELING.

THE FUNDAMENTAL LEVEL NET -- DATUM -- ACCURACY -- VARIATION OF MEAN SEA-LEVEL FROM A LEVEL SURFACE -- ELEVATIONS OF MOUNTAIN PEAKS -- REFERENCES -- CHAPTER XV THE DETERMINATION OF GEOGRAPHIC POSITIONS -- GEOGRAPHIC POSITIONS DETERMINED BY GEODETIC METHODS -- REFERENCES -- VARIATION OF LATITUDE -- CHAPTER XVI THE VARIATION OF LATITUDE -- PRELIMINARY CONSIDERATIONS -- HISTORICAL AND DESCRIPTIVE ACCOUNT -- OBSERVATIONS ON THE VARIATION OF LATITUDE -- THE THEORETICAL CURVE OF POLAR MOTION -- THE OBSERVED MOTION OF THE POLE -- DISCUSSION -- SECULAR MOTION OF THE POLE -- OTHER PHENOMENA IN THE VARIATION OF LATITUDE -- GEOPHYSICAL SIGNIFICANCE OF THE VARIATION OF LATITUDE -- ASTRONOMICAL SIGNIFICANCE OF THE VARIATION OF LATITUDE -- BIBLIOGRAPHICAL NOTE -- INDEX.