On the influence of Production of Metals on Environment in Iwami Silver Mine in 17-19^<th> Centuries

结合地学资料和有关选矿冶炼技术、经济和社会背景等方面的文献资料，分析了17~18世纪岩上银矿金属生产对环境的影响相对于国外并不严重的原因。在18世纪上半叶（福石矿）和18世纪下半叶（英休矿）之前使用的矿石种类不同，但对环境影响不严重的主要共同原因是在德川幕府的控制下，日本矿山之间对资源的精心处理和良好的技术交流。这意味着日本与其他国家相比，在环境保护方面的优势得到了体现。

The reason why the influence of metal production in Iwami Silver Mine in 17~18 centuries on environment was not severe compared with that of foreign countries, was studied based on the data of earth science and old documents on technologies of dressing and smelting, economy and social back ground.Sorts of used ore were different before the first half of 18 centuries (Fukuishi mine) and after latter half of 18 centuries (Eikyu mine), but, the main common reasons of the non-severe influence on environment were careful work in handling resources and good exchange of technologies between mines of Japan, under control of Tokugawa shogunate. That means the strong points of Japan compared with other countries were demonstrated in environmental conservation, as the result.