Objectives: This series of proposals involves the exposure of Biological material whose genetic response to conventional forms of ionizing radiation and to atom bomb radiation is It is hoped to extend and comploment carlicr studies known, of mutations, mutations rates) ctc, In the case of Neurospora, reversal of mutations obtained at Bikini will be sought; and additional chomiceal mutants will be looked fors The problem of the high incidence of chlorotic kerngls in corn cxposed at Bikini will be studicd furthers Procedure: Most of these materials will be exposed also as biological dosimeters; but also samples will be placed in the very high dosage rangee Most of the matcrials will be returned to the U, 8S. for further study. <spergillus and Neurespcra will be cultured in the Island laboratory before the tests. Responsible Agencies: ima ond others U. Sa, Department of agriculturc, and NME cereals Aspergillus terreus: Oak Ridge Notional Laboratory, and NME Onk Ridge National Laboratory, and NMB Neurospora ercssa: Project 10: Setel Effect of Atom Bomb on Loeal Fauna an Flora Responsible Agency: U. 5. Department of Arriculture, and NME Objectives: to study the thermal and blast effects of atom bomb blest on loerl faunon «... flora, te extend observations at Bikini and Eniwotok. fields: Project 11: Setece Naturalists, qualified in a number of birds, inscects, plants, etc, may be avnilnable, Dosimetry with Mineral Substances Responsible Arency: National Military Establishment Objectives: To conduct further studies on certnin minerals: Vikor glass, activated halides, ctc. which are affected by lonizing radiation. Preliminary studies at the NMRI and at Bikini suggest that these agents may be uscful, rugged, integrating dosimeters for personnel, and other purposes. Procedures Samples of these calibrated radiation-sonsitive materinls will be placed in all animal containers; and at a number of other stations where very precise physical menaire= ment by other means are being made; and at stations where high intensity is expected, C= 4 2 A Gonctical Effects of .itom Bomb Radiation mm wh Project 9: