我们的祖先曾经为磁学作出卓越的贡献。早在公元前四世纪战国时期就已经有磁石的记载。战国末期不仅知道磁石有吸铁、指南的特征,而且还利用天然磁石造出原始的指南工具——司南。由于磁学历史悠久而人类又生活在一个很大的地磁场之中,所以磁场对于物理、化学以及生命现象的许多影响不断为人们所发现和应用。例如磁场的许多生化效应国内外都有不少报导。其中有的已成功地用于农业生产;有的则被发展成为新颖的医疗途径。磁场对化学反应的影响也早就为人们所注意。不过在早期的文献报导中争论较多,例如 Our ancestors used to make outstanding contributions to magnetism. As early as the fourth century BC during the Warring States period there has been magnet records. The end of the Warring States period not only know magnet magnetism, the characteristics of the guide, but also the use of natural magnet to create the original guide tool - Secretary South. Due to the long history of magnetism and the fact that human beings live in a large geomagnetic field, many effects of the magnetic field on the physical, chemical and biological phenomena are continuously discovered and applied. For example, many biochemical effects of magnetic fields have been reported at home and abroad. Some of these have been successfully used in agricultural production; others have been developed as novel medical approaches. The impact of the magnetic field on the chemical reaction has long been people’s attention. However, there has been much debate in earlier literature, for example