讀了张觉人同志发表于江苏中医1963年3月号“談制炼升降丹药的經验介紹”一文,感到内容丰富,很有受益和启发。但是也发现一些問題,愿与作者商榷。誠如张氏所說“升降丹药各有师承和体会”,所以借此談談我个人的經验与体会,以交流心得,有不足之处,希同道予以指正。张氏在其文章之始,談到我国炼丹术的起源和演变,本应对升降丹的起源和发展均予以必要論述,以与后文相呼应。但文中所引証之文献无一是說明降丹的,而全是升丹的,据笔者所查該文献并未有白降丹的記載。而云:“这种化合物是具有腐蝕作用的一种丹药,类似现今所用的紅升丹和白降丹”,所以用《周礼》天官冢宰篇及郑玄氏的注文来兼述白降丹,是会給讀者 After reading Comrade Zhang Jue-ren’s article published in the March 1963 issue of Jiangsu Traditional Chinese Medicine, “Introduction to the Experience of Making and Stimulating the Elixir of Elixir”, I feel that it is rich in content and useful and inspiring. However, I also found some problems and I would like to discuss with the author. As Zhang said, “Everyone has to admit and experience”, so I would like to talk about my personal experience and experience, and I will share my experience. There are deficiencies and I would like to correct me. At the beginning of his article, Zhang talked about the origin and evolution of China’s alchemy. He should have discussed the origin and development of the Dandan, in order to echo the later text. However, none of the documents cited in the article is about Dan Dan, but all of Dan Dan. According to the author’s investigation of this document, there is no record of Bai Dan. And Yun: “This compound is a kind of embolism that has a corrosive effect, similar to the current use of Hong Sheng Dan and Bai Jiang Dan.” Therefore, the use of “Zhou Li” Tian Guan Xi Zai Pian and Zheng Xuan Shi’s note to describe the white fall Dan, it will give readers