1. Perspective on Chlorinated Dibenzodioxins and Dibenzofurans (Environmental Health Perspectives, Experimental Issue No. 5, Department of Health, Education, and Welfare Publication No. NIH 74–128, National Institute of Environmental Health Sciences, Box 12233, Research Triangle Park, N.C., September 1973). Several articles deal with the toxicity of the dioxins. See particularly table 4 in the article by R. Baughman and M. S. Meselson, pp. 27–35, which summarizes the results of earlier workers.
2. V. Earle, Ed., On Academic Freedom (American Enterprise Institute, Washington, D.C., 1971).
3. P. Berget al., Science 185, 303 (1974); N. Wade,ibid., p. 332.
4. (a) In February 1975, an international conference of experts at the Asilomar Conference Center in California devoted several days of intensive discussions to this problem and concluded with a recommendation to lift the voluntary moratorium on most of these proposed genetic experiments. However, such experiments were to be done only subject to rigorous precautions for containment of the possibly hazardous organisms, the stringency of the precautions increasing with the estimated risk in different categories of experiments. Indeed, for many of the possible experiments, the required conditions cannot be met without the development of new organisms and new techniques, so that the moratorium is in effect being continued for such experiments. See N. Wade, Science 187, 931 (1975).
5. J. Katz, Ed., Experimentation with Human Beings (Russell Sage Foundation, New York, 1972).