Kung-Fu, or Tauist Medical Gymnastics, by John Dudgeon, [1895], at sacred-texts.com
No. 17.—Hsueh Tao-kwang (#) rubbing his Heel.—For nourishing the original essence.
Sit straight, with the hands rub until warm the sole of the left foot, move the air in 24 mouthfuls, afterwards rub warm the sole of the right foot, the rest the same as the left.
The Figure resembles No. 8 of the Ornamental Sections, and is therefore omitted.
The Extract of the Two Immortals, Kwei and Lu. (The Tortoise and Deer).
168:* A celebrated Tauist philosopher and alchemist of the Han dynasty, who is known to have devoted himself to the preparation of the elixir of immortality, and who is the author of a professed commentary on the Yih-king, or Book of Changes.