the Growth Annals of Botany 10: 1946 353–359 R. S. de Ropp, The Growth-Promoting Action of Bacteria-Free Crown-Gall Tumor Tissue Bulletin of the Torrey Botanical Club, Vol. 75, No. 1 (Jan. - Feb. 1948), pp. 45–50 R. S. de Ropp, The Interaction of Normal and Crown-Gall Tumor Tissue in in Vitro Grafts American Journal of Botany, Vol. 35, No. 7 (Jul., 1948), pp. 372–377 R. S. de Ropp, The Action of Some Chemical Growth Inhibitors on Healthy and Tumor Tissue of Plants Cancer Research 11, September 1, 1951 663–668, R. S. de Ropp and Doris McKenzie, The Transplantation of Small Numbers of Tumor Cells Cancer Research 14, September 1, 1954, 588–590 R. S. de Ropp and Elizabeth Markley, The Correlation of Different Aspects of Auxin Action Plant Physiol. 30 (3): May 1955; 210–214. E. Jack Davis & R. S. de Ropp, Metabolic Origin of Urinary Methylamine in the Rat Nature 190 (13 May 1961) 636–637 Books Drugs and the Mind (1957) Man Against Aging (1960) Science and Salvation (1962) The Master Game: Beyond the Drug Experience (1968) Sex Energy: The Sexual Force in Man and Animals (1969) The New Prometheans (1972) Church of the Earth: The Ecology of a Creative Community (1974) Eco-Tech: The Whole-Earther's Guide to the Alternate Society (1975) Warrior's Way: The Challenging Life Games (1979) Self-Completion: Keys to the Meaningful Life (1988) Warrior's Way: A Twentieth Century Odyssey (1995) References 1913 births 1987 deaths Alumni of Imperial College London American spiritual writers British psychedelic drug advocates Fourth Way Psychedelic drug researchers 20th-century American writers People of Cossack descent