(Thematic) Guide To Correct Diet, Health, Happiness And Beauty, The Institute Of Mentalphysics, c. 1930 Edwin J. Dingle was a journalist born in Cornwall, but worked in Singapore and deep into China in the 1910's and 1920's. He was an early explorer of Tibetan spirituality and spent time at monastery studying meditation and breathing exercises from Tibetan monks. Dingle returned to the U.S. and settled in Oakland, CA., spending the next seven years in retreat presumably organizing his teachings based on vegetarianism, pranayama meditation, and developing extrasensory perception. Soon after he moved to Los Angeles and began teaching his approach at a church and began to codify his approach to diet. In this chart he points to twenty one different types, and what leading elements could address the issue through food. It strikes one as being a extrapolation of the theory of humors, but with sciency jargon. Rare. Condition is very good. Image size is approximately 28 x 20(inches)