ONE of the early Chinese texts on alchemy is the Ts'an T'ung Ch'i of Wei Po Yang, who has been called the father of Chinese alchemy. His treatise has been regarded as the earliest work in the Chinese ...

THROUGH the kindness of the Editor of NATURE, I have had an opportunity of seeing Prof. Read's interesting letter. The citations which he gives from Sse Ma Tsien's chronicles (a careful translation of ...