For the periods under consideration, (ref.7) 4 ¢5 t ny E E n dy(abe) i dy(Feather) Ps 1 O.15d ld 1.12 1.9 Mev 0.75 Mev 0.10 gm/em 0.11 gm/em™ 6.4 om™) 2 1 4 1.25 1.2 O44 0.05 0.06 iL 3 4 30 0.98 0.85 0.29 0.03 0.04 18 Thus the total dose in 30 days, D, is D = 1.7 (2300) (0.030 + 0.047 # 0.133) s 820rep for shot 2, and 620/13.4 2 60repfor shot 9. It is of interest to note that 120 rep of the shot 2 dose occurs in the first day, 180 rep between first and fourth day, and the remaining 520 rep in the following 26 days out of 30, and similarly for shot 9. This of course cannot be considered as more than an order of magnitude calculation in view of the assumptions, but 1t does illustrate that a rather significant degree of damage could oceur in this radiosensitive area. HeExternalbetadoses. Several cases were reported (8) of animals with activity deposited on head, abdomen, etc. If one assumes that this de- posit results from contact with the ground, particularly around the mouth and head, one can calculate an extreme case for external beta exposure from this material by assuming that the material was deposited at the beginning of the exposure and remained throughout it. In addition, an external beta exposure to the head from the ground itself can be estimated. For the first case an & July dose rate reading of 50 mr beta on the head of an animal is taken from ref. 7. This is the highest of the group of read- ings given, pby s Bty t x () 1.2 e 20 e e e a « 2 ° e e « e e e e ® e (16) ya DO’ ARCHIVES