2600 total roentzens respectively for ICQ por ecnt tethality*. Experimental data reported by Boche** are summarized below. . Ko. of Dose per Deve_ Dose YayGol Survival Heekty) Totel Dese TineOta) (re) 14/0 2988 24, &3 - 60 36 10 6 20 10 per Unfortyuvately normal survival times were not given nor were the ages of the animals (dogs). Blair*** has taken the two points from Boche's data, inserted these into his (Blair's) equation relating reparable and irreparable damspe, The ratio of instanianeous dose to l5-dcy dose is 359/450 or 4, wo 0,78, and csr 4 months dose ebout 350/525 ev 0.67. ~~ aa ~ 7 . r ~ ta if fry > 4 Bleizr wwgests that "The points ere too fuy to determine © O ~ 4 constants (of the equation) with any accuracy bit should at least be in the proper range." However, the constants of his equation hsve checked well vith more extensive data on other animals, His cquations Arifcerve that the rate of racovery of repo able antury is fastest in ne mouse (ef the tipes of mumuals select.d), about one-half «> fast gn the rut and atec.b cne-seventh as fast in the ginea pig soc dog, but as Llcir pointed cut, the reaction cf the dog is more repvesentative of the larger, longer-lived aninals. “e ~ FUCLA-295. Response of the Burro to 10) nr Fractional Whole-Fod7 Gemma Rey Radiation. Haley, T. J. et al, June 10, 1954. Unclassified. F#MDDC-204. Observations on Populations of Animals Exposed to Chronic Roentcen Irradiation, Boche, R.D. 1947. Unclassified. ***UR-207. A Formulation of the Injury, Span, Life Dose Relations For donizing Radistions. JI. Applications to the Guines Pig, Ret, and Doz, Blair, H. Aw duly 3, 1952. Unclassified. -10 = =