~ll- unexposed animals of this strein end those Siven various amounts of 250 k.v. x-rays have been w2ll este blished. b. Neutron survivors: The survivors of the eight neutron groups of neutron-exposed animels (50-*0 ver group in hemissherical stations) will also be returned to Furth. They will te exposed to approximately the following nimber of rem of neutrons: 14, 40, 70, 140, 560, end 1120. IT don't know how they ere going to control tnese groups (I su x-ose by uneynosed animels). 3. Inhaletion "xperiments: will be ~leced Groups of (?) 30 mice in the fuselage of drone planes and the outside air including f. p. will be ednitted through louvres into their container. when the aninmels are returmed to Jevtan, they Will be secrificed serici7y. The lungs, gi. tracts, sxin and cercasses will be pooled, frozen and returned to Los Alemos for astay. The totel redioactivity of the orgens, end thet due to molybdenun, vill be determined. In this way it will be possible to differentiste between f.n. d2nosited on srin end subsecuently swellowed fron that inheled. I don't know what kind of physical air semrling devices will be used to control this ex-eriment other th-n those used to collect semples for yield chenistry. This is one of