re of sarily fiseien materizis by asricuitusol srops and ecley minerel influences. 3. Effects of Radiation Histelocical preperatbicns of aeloetead animal tissue and plant samples will be made, ag well as eosurvatione on native rodents remeved “rem contaminated onmvironvents and maintained in the Laboratory. h. Method of Volake The role of inhalation in the contribution of metebalic ace tivity found in enime 2 will be cwaiartaken. 56 osure am Determination of actual c:sadiatior, axcosure of animals as a function of micro envircnments, sid correlation of dose to physical msasurements of activity will 26 established. It should be noted that these undertasings are dependent upen ob= taining data during the first twenty-four to forty<ight hours after Shot and zcre, therevora, logical field undertakings. At the same time the successful interpretation of biological data nestssitetes the availae bility of data pertaiming to the physical characteristics of Fall-out, i.e., total residual environmental convemirs:tions particle size distribution; physical choracteristics of particicsus rzlation of biclogical sampling aroas to over-all Falil-out pettorn: aad rates of accwrulation or dispersion of ectivity in the environusst. The abeve vroposal is there=~ fore predicated on the fact that the Durt on? Particulate studies will be activated and furistion as a separate profes. DO# ARCHIVES