3. ™ ny Wo Effective rates of body clearance of radioactive materials after a twenty-four hour exposure to the various components of "Fall- out." h. Histological and hemotological studies of various tissues from exposed animals will be made. Se Several of the animals which have received maximum exposure will be shippsd to Comarts laboratory at Oak Ridge for periodic observation and study for one year or less. In each general area of animal exposure during a "Fall-out," the following physical data will be obtained (to be proposed as an integral part of the Dust and Particulate Project). a. Amount of air-borne concentraticn of radioactivity will be measured. b. Determination of the particle size of "Fall-out," c. Energy epectrum of radicactive "Falleont." da. Total radioactivity per unit area of surface. e, Time of arrival of "Fall-out" per location. _£. Pattern of "Fall-out" and isodose curves within the selected exposure area will be made. g- Attempted evaluation of the light intensity initially of the bemd datonation as an evaluation of possible induced blind=ness in animals. This project should be ready as a formal proposal to D.B.M. by Janu= ary, 1951, if the respective administrative problems are jointly approved. * “* “pOe ARCHIVES