ACKNOWLEDGMENT Acknowledgement is gratefully made for the kind assistance in reviewing the manuscript and offering many helpful suggestiona: Dr, Charles L, Dunham, Director, Division of Biology and Medicine, AEC, Washington, D. C.3 D. Cos Dr. Forrest Western, Health Physicist, AEC, Washington, Dr. Karl Z, Morgan, Director, Health Physics Division, Oak Ridge National Iaboratory; Dr. Victor P. Bond, Brookhaven National Laboratory; Dr, George V. LeRoy, Associate Dean, School of Medicine, The University of Chicago; Dr. C, lL. Comar, Chief, Biomedical Research, Oak Ridge Institute of Nuclear Studies; Dr. Stanton E, Cohn, Head, Internal Toxicity Branch, U. S, Naval Radiological Defense Laboratory, San Francisco 2h, Californias California. Mr. Charles Sandhaus, University of California, Berkeley, DOE ARCHIVES 3: