The job of the responsible zoologist should be to assess or attempt to predict the consequences of any effluent or other environmental disturbance as objectively as possible, bearing in mind both the needs of conservation and the reasonable demands of man.

Reviews problem of heat discharges into waterways, especially as related to steam electrical generating plants, and their effects upon river ecological systems. Feb. 13 hearing was held in Portland, Maine; and Feb. 14 hearing was held in Montpelier, Vt., pt.1; Continuation of hearings on water pollution problems caused by electric power plants. Apr. 19 hearing was held in Miami, Fla., pt.2; Appendix includes "Heated Effluents and Effects on Aquatic Life with Emphasis on Fishes," a bibliography by Edward C. Raney and Bruce W. Menzel, Cornell Univ. for Philadelphia Electric Co. and Ichthyological Associates, July 7, 1967 (p. 1285-1374); and "Water Temperatures and Aquatic Life," a report by Charles B. Wurtz and Charles E. Renn, for the Edison Electric Institute, June 1, 1965 (p. 1139-1243), pt.4.