Psychological Reports, 1968. Xerox type reprint from Psychological Reports 1973, 33. Stapled at upper left corner. Pages[1], iii-iv, 24 pages. Figures. Tables. References. The name T. L. Pitchford was written on the front page, perhaps indicating authorship. Psychological Reports is a bimonthly peer-reviewed academic journal covering research in psychology and psychiatry. It was established by Robert and Carol H. Ammons in 1955. This study provides extensive data on a wide range of radiation dose levels applied to a statistically significant number of beagle dogs. From a military standpoint the results of this research are an important contribution to the data on the time and duration of incapacitation resulting from exposures to ionizing radiation. The fact that none of the beagle dogs used in these experiments sowed any early transient incapacitation (ETI) at any dose level illustrates the differences in response that must be considered in evaluating the data obtained from animal experiments. Animals exposed to 40 krads or more generally suffered complete incapacitation within minutes of irradiation and remained in that state until succumbed. The dose response data for man are expected to assume greater validity if they are based on experiments using a variety of experimental animals. More