The documents relate to the work of Manfred Porkert of Munich, Germany, and his interpretation of the terms of traditional Chinese medicine. Most are connected with Joseph Needham and Lu Gwei-Djen's review article of Porkert's 'Theoretical Foundations of Chinese Medicine', (Massachusetts Institute of Technology Press, 1974), (a translation of the original 'Die Theoretischen Grundlagen der chinesischen Medizin', (Wiesbaden, 1973).