引论——潮汐为自然界中有规律的现象之一,沿海各地,无处不有潮汐之影响,江湾水面之升降,往往可达一二十公尺。我国钱塘江潮,素称於世。奔腾澎湃,吞天浴日,蔚为奇观,自来骚人雅士形之吟咏者,不一而足。兹篇所述,拟以浅近理论,作潮汐之说明。其关於最近之研究与发展,亦备述於後焉。 INTRODUCTION - Tides are one of the regular phenomena in nature. Everywhere along the coast, there are tidal effects everywhere. The water surface of Jiangwan usually goes up and down, often up to 120 meters. Qiantang River in China, known as the world. Pentium surging, Swallow day Bath day, Wei spectacle, since the singer Atsu-shaped chant person, one after another. As mentioned in this article, it is proposed to use shallow theory as a description of tides. Its latest research and development are also described later.