
Source: Humanity Comes of Age, A study of Individual and World Fulfillment (1950), Chapter XV The Essential Science of Breathing
Andrew Ure (1819) Quart. J. Sci., vol. 6, pp. 283-294. quoted by: W.S.C. Copeman, (1951). "Andrew Ure, M.D., F.R.S. (1778-1857)". Proceedings of the Royal Society of Medicine. Royal Society of Medicine. 44 (8): pp. 658–59,
Source: Humanity Comes of Age, A study of Individual and World Fulfillment (1950), Chapter XV The Essential Science of Breathing
The Notebooks of Leonardo Da Vinci (1938), XVII Flight
"Only the Soul"
Degrees: Thought Capsules and Micro Tales (1989)
Song lyrics, Time Out of Mind (1997), Not Dark Yet
Source: The Natural History of the Soul (1745), Ch. V Concerning the Moving Force of Matter