导言道藏经是有关道教的大丛书,前北京白云观所藏明刊本四千多册,影印本缩为一千多册。其中收集了许多中国古代自然科学的丰富材料,主要是医学、本草、天文学和外丹黄白术等。中国外丹黄白术,是我国古代的原始化学。有关这方面的材料,大部是实验材料,小部是拟设材料。要研究中国外丹黄白术,必须整理这些材料,但整理中有两个难关:一是外丹 Introduction Taoism Tripitaka is a large series of books on Taoism. The former Beijing Baiyun Guanzhai contains more than 4,000 volumes of printed books, and photocopies are reduced to more than 1,000 volumes. It has collected many rich materials of ancient Chinese natural sciences, mainly medicine, Materia Medica, astronomy and Outer Dan Huangbai operation. Chinese foreign Dan Huang Atractylodes, is China’s ancient primitive chemistry. Most of the materials in this area are experimental materials and the small ones are proposed materials. To study the Chinese foreign Huang and Atractylodes, we must organize these materials, but there are two difficulties in finishing: First, foreign Dan