title: Master Geng
text: # Master Geng
  
  Master Geng (Chinese: 耿先生; pinyin: Gěng Xiānshēng; Wade–Giles: $Kêng^3$ $Hsien^1-shêng^1,$ died c. 975 CE) was a Chinese alchemist.
  
  Geng was employed at the Imperial Court. She distilled perfumes, and utilized an early form of the Soxhlet process to extract camphor into alcohol, and gained recognition for her skill in using mercury to extract silver from ores.
  
  